Potato osmosis lab graph


Potato Osmosis. Select Finish. Osmosis 2 OSMOSIS INTRODUCTION: By definition, osmosis is the diffusion, or dispersion, of water through a selectively permeable membrane from a higher concentration to a lower concentration (Campbell, pg. D Introduction Diffusion and osmosis as related to cellular processes Cells constitute the units of life and in order to stay alive they need to fulfill their metabolic activities. Step 3: Stir the solutions using the spatula in order for the salt to dissolve. On the next lab day, gently pour the water over a screen into a sink. In this lab you will observe osmosis occurring through membranes of potato cells. Directions: *You need to make a hypothesis for each section. I will use the same amount of solution in which each potato piece will be placed into (10ml). Remove the potato chips from the blackcurrant squash, dry and reweigh. Purpose: To see how a potato/carrot. 4m it was stated that the potato core would stay the same, making the surroundings it was in isotonic. 0 mL of the sucrose solutions to the correct test tube. Also calculate the percentage increase or decrease in mass and place answers in the third column in the table. Lab 3. Because of the large amount of redundancy that exists in this lab, we will process the entirety of the yam data first, showing all of the sample calculations along the way, and then display sweet potato data, which will be processed the exact same way. Graph 1:The effect of the 5-sucrose concentration on the averagepercentage change in the mass of the potato cylinders. 3). Your title should be in the following format: Y-axis Variable vs. Potato Osmosis Experiment + Steps. If the percent change in mass is positive, that means the solution is hypotonic. This means water moved into the potato cells, which demonstrates that potato cells have a salt concentration of more than 0. Construct a graph showing the sugar concentration on the x-axis and rate of  We will be completing a full lab report on this lab, including data tables, graphs, calculations, data. Potatoes can remove too much salt from soup via osmosis - add a peeled potato to the soup and simmer until it tastes less salty. Neco high essay Inc osmosis potato lab report. What was the initial task? To determine an unknown concentration of a sucrose solution using a potato. BIOLOGY LAB: OSMOSIS IN POTATO CELLS. Education Resources. This part of the experiment requires a large potato, potato corer (about 3 cm long), 250 ml beaker, paper towels, scale, six cups, knife, paper, pencil and about 100 ml of each of these solutions: distilled water, 0. 8 percent, the potatoes would lose mass due to osmosis pulling water from the potatoes. Gently dry and weigh the egg. Theory: Osmosis is the passage of water molecules from a weaker solution into a stronger solution, through a partially permeable membrane. This can found by analyzing Graph 1. The potatoes that gained weight were the potatoes placed in deionized water, and the sucrose solution molarity of 0. With a hypotonic environment, the water concentration is greater outside the cell, with solute concentration higher inside. Method: 3. 132). The select Next. Potato osmosis bi lab - Biology. The reverse occurs when the concentration of the surrounding solution is very low (lower than the vegetable). 1. A sample of a Simple Potato Osmosis Lab Report Presented below is a sample of a simple potato Osmosis lab report that you can use as a guide when writing your lab report if you want your work to be awarded reasonably high marks. Out of the cell. Paste in lab book: Procedure for Potato Cores: Pl. Andersen shows you how to properly core potatoes for the osmosis lab. 2. Introduction. Demonstration of the Phenomenon of Osmosis 2. Determination of Osmotic Pressure of Integrated Plant Tissues and Others. 4 M, 0. 3 M, 0. The real cell system in the second lab was a potato. 1 Molar. Remove the potato core from the borer. Osmosis is the diffusion of water through a selectively permeable membrane (a membrane that allows for diffusion of certain solutes and water) from a region of higher water potential to a region of lower water potential. 2) Infer the relationship between weight loss and rate of osmosis. the Process in Which Molecules of a Substance In an isotonic environment, solute concentration and water are equal inside and outside the cell. Type in the Title of your graph using the variables from your lab investigation. Osmosis experiment (lab report) As you can see in the graph, from 0. If water moves out of the animal cell, the cell will . From the graph an estimate to the concentration. Putting potato strips into sucrose solution of various concentrations and find. 05 2. 1A: Below is the graph of the percent change in mass for potato cores at each solution. 3, but this has labeled which solutions were hypersonic to the potato cytoplasm, which were hypotonic, and which was isotonic. Label 6 test tubes as follows: 0. 16. 3. The tiny holes in the membrane of the potatoes will allow the water molecules to pass through in and out of the solution and the potato, Purpose: The purpose of this lab was to determine the water potential of potato cells. In this experiment varying glucose concentrations of 0%, 10%, 20% and 30% were placed in the cellophane bags against the distilled water. 8 to 1. Water goes in and out of the cell at an equal rate. It is important for an IV solution to have salts in it so the water and solute can be equal to create an isotonic environment. - measure changes in mass Our assumption is that potato cells will behave like the sailor's cells in his body. Osmosis is the movement of water through a selectively permeable. Leave them for osmosis to occur. Osmosis Lab The purpose of this lab is to test the effect of sugar concentration on the percent change in mass in potatoes. The data you collect should allow you to be able to create a graph of the surface area (x-axis) against the amount of a) must reflect what your lab is about. As we can see in Figure’s 1. In animal cells, the movement of water into and out of the cell is influenced by the relative concentration of solute on either side of the cell membrane. 0 M glucose. Place on paper towel or waxed paper. Okay, so in biology class we did a lab about osmosis. Introduction : Water potential measures water’s tendency to leave one place in favor of another place. Catch each bear using a sieve, plastic fork or screen. Movement of water in and out of cells by osmosis. This is the equilibrium point; at this point there is no net gain or loss of water from the potato cells. Because each tube has lost mass, that means each tested solution must be hyper-tonic. Diffusion/Osmosis Student Task Sheet Introduction: This laboratory test presents a. Prepare two identical solutions with a cup of water and 2 tbsp. Net osmosis = 0 when the system reaches equilibrium. 1 Overview Bioknowledgy PPT Identify the concentration of salt solution that is isotonic with a piece of potato Osmosis The diffusion of water across a semi-permeable barrier, from an area of higher water concentration to an area of lower water concentration - Review graph set up for lab write-up. Predict what would happen to the mass of each type of potato in this experiment if all the potatoes were placed in a different sucrose solution or distilled water. docx), PDF File (. Essay about Osmosis in Potatoes. We massed the potato group for each of the solutions and recorded the mass before placing the potato cores inside the solutions. In trying to find a cell’s water potential in different molar concentrations and how the concentrations affect a real cell system, we conducted two labs. How to Understand Osmosis with Eggs. We put three slices of potatoes in salt water, pure water, and tap water. Hypothesis: The more hypertonic potato cores are to sucrose solution, the more weight potato cores gain. 1 SUMMARY In this experiment, we are Due to spacing issue, graphs will be attached at the end of the report Percent  Osmosis Lab: Graphing with Excel 1st Graph: Group Data 1. Osmosis lab report essaysDiffusion is the movement of particles from an area of. Potato OsmosisBiology SL - ATh INVESTIGATION “Potato Osmosis”INTRODUCTION Osmosis is a process that occurs at a cellular level that entails the spontaneous netmovement of water through a semi-permeable membrane from a region of low solute concentrationto an area of high solute concentration in order to equalize the level of water in each region. Osmosis and Surface Area/Volume Relationships. Lab 5 Diffusion and Osmosis. Biology Lab Report Ib Hl Osmosis. To find this, draw the straight line on the graph that best fits your data. Measure the water potential of a solution in a controlled experiment; determine the osmotic. Potato Osmosis Lab will include 1 graph, analysis and conclusion. If we take seawater as an example of a solution, the salt is called the solute (the particles that are dissolved) and the water is the solvent (the liquid that dissolves the particles). 5% -10. To determine ifavailable,the salt instandthe waterpotatohas anoneffect on the potato cells, you first need to cut 4 equalthroughsized slices of potato to represent the sailor. Water potential is the measure of free energy of water in a solution. ★ Hypothesis: (Circle one for each statement) The gummy bear left in plain water will shrink swell stay the same. The salt water made the potato shrink and the tap water made it grow. Remove the potato before serving. What type of graph could you create to help make sense of your data? Oct 15, 2016 Osmosis potato lab report - We Write Custom College Essay Writing. OBJECTIVES. Fill the cavity with the sugar solution and fit an airtight cork fitted with a capillary tube on the upper end of the cavity (fig. Term Papers Warehouse. Make enough to have three potato cores per solution. In both plants and animals, each cell is surrounded by a membrane. Results Table Solution Answers will vary depending, the graph must be constructed to determine the molar concentration of the potato cores. The experiment will show how molecules in a solution are able to move from an area of high concentration to an area of low concentration. In plant cells, the presence of a prevents the cells from bursting. 2 molar sucrose, . Label 6 beakers using tape and marker as – 1 M sucrose, 0. 0. Osmosis occurs when water moves from an area where it is more concentrated to an area where it is less concentrated. To quantitatively measure the rate of plasmolysis in potato slices. Osmosis is a biological and chemical process that describes the movement of water from a less concentrated solution to a more concentrated solution. To test the semi-permeable osmosis potato lab report qualities. Discussion Hypothesis and Refutation of Hypothesis The hypothesis tested in this lab was: If the potato is submerged in a solution of 0. In order to test for osmosis in the potato, you will need two empty glasses (which will later be filled with water), two glasses (one filled with sugar solution, and one filled with tap water), two potatoes, and two pins. Shrunken potatoes are flimsy. 24 and 0. Start by measuring 0. The type of solution used will affect the molarity of the substance. 2 M, 0. Diffusion and Osmosis Lab. Title: Structure and osmosis cell of potato. Determine your axes: x (the horizontal axis) is for the independent variable; y (the vertical axis) is for the dependent variable. Lab Topic: Effects of Osmosis with Potato Cells in Sucrose Solution Introduction: Small slices of potato are placed in six concentrations of sucrose: 0. 6 M Sucrose 0. A lab experiment for osmosis with potatoes involves putting half a potato in plain water and the other half in salt water and observing the difference in appearance. –Procedure 1 is an investigation of diffusion through a cube of agar. 20M, 0. Lab: Observing Osmosis in Gummi Bears Title the graph (what is being compared?) Label the axis. 1 outline work time B3: Guest speaker (genetic counselor) and work time 12/12/17: 1. rate of water movement into or out of the egg. o Pressure – Areas of different pressure have different water potentials. A thorough description of the lab protocol is included along with a brief description of percent mass change. 10M, 0. 3, but this has labeled which solutions were hypertonic to the potato cytoplasm, which were hypotonic, and which was isotonic. A powerpoint to recap the theory of osmosis and prepare them for the potato practical. Osmosis: How Does the Concentration of Salt in Water Affect the Rate of Osmosis? Introduction . They are primarily composed of water (the solvent), and a variety of dissolved solutes, such as sugars, amino acids, and ions. Water moves through membranes by diffusion; this process is called osmosis. Example 2 A piece of potato has a mass of 2. On your graph, find the point where the line of your data crosses the 0 line (x axis) of the grid. 6 Molar 0. 8%. Change in mass of the chipped potatoes which will represent osmosis in chipped potatoes Osmosis and Diffusion Lab Analysis and Conclusion. IB lab report · Sample Lab Report Potato Osmosis Osmosis Potato Scribd. Discard potato and clean up. 0 M, 0. Osmosis Lab This is a flipped learning lesson. 5% of NaCl, then 1%, then 3%, and finally 5% and add each one in a different beaker. Dry and reweigh this egg every two minutes for about a half hour. Osmosis and Diffusion Lab Report Introduction All Cells Contain Membranes That Are Selectively Permeable, Allowing Certain Things to Pass Into and Leave Out of the Cell. 01 1. Actually, Osmosis lab reports are usually used as practice for further, more. Obtain 6 strips of dialysis tubing and tie a knot in one end of each. The purpose of this lab is to test the effect of sugar concentration on the percent change in mass in potatoes. The minus sign shows that it has lost mass - it will have lost water by osmosis. I will be measuring each potato piece with a ruler to ensure each is of an equal length (2cm). 4, 0. 0 molar glucose solution is the point where the potato cylinders lose most of their mass. 2), the water potential of the potato can be determined by the point at which the data line crosses 0% change as that would be the point of equilibrium where water is entering and leaving the cell at the same rate. With the egg shell gone, the egg’s membrane allowed some of the vinegar and the water from the vinegar to pass into the egg. Extracts from this document. my lab report on osmotic concentration in potato cells I made progress on this second lab report. o Surface area – The larger the surface area, the more water can be absorbed into the cells, therefore altering the rate of osmosis. 5. Figure 2. Discussion Through the results of this lab, we have discovered that the potato increased in weight when it was placed in the solution of distilled water, but then decreased in weight as the sucrose molarity increased. One aspect of this “adaptation” is the process of osmosis. I'M REALLY CONFUSED. Osmosis potato lab report - We Write Custom College Essay Writing. This means that the potatoes soaked in the 0. Osmosis is the tendency of water in salt water to flow from an area of low salt. To observe the effect of different types of solutions on living cells. 3, when there was no sucrose solution, the potato increased in weight. 09 % change in mass -12. Cut potato in half lengthwise. Graph the increase and decrease in mass of the potato cores according to the molarity of the  Osmosis is the movement of a solvent across a semi-permeable membrane from an In this lab we will test samples of potato tissue to see how much water they absorb or Prepare a graph showing change in mass as a function of % salt. Osmosis is a special case of diffusion, in which water diffuses across a selectively permeable membrane. In this lab, the effect of osmosis on a gummy bear placed in a salt solution will. Assuming that 0. You can use potatoes to set up osmosis experiments for students of all ages and levels. ABSTRACT. Purpose: 1. Like solutes, water moves down its concentration gradient. 4 M Sucrose 0. 5%). Osmosis, therefore, is related to the concentration of solutes inside a cell relative to the concentration of solutes outside of a cell. and concentration) on diffusion of potassium permanganate into potato cubes. If there are more solutes inside a cell, osmosis will move water in and if there are more solutes outside a cell, osmosis will move water out. Investigate the processes of osmosis and diffusion in a model of a membrane system. Using a twisting motion, insert the cork borer all the way into the potato lengthwise. Through osmosis, water molecules move in order to make the water potential and concentration of the surrounding solution and the vegetable equal. be completing a full lab report on this lab, including data tables, graphs, . Labs: AP Lab 1: Osmosis and Diffusion. Graph the class results for the percent change in mass. Our data slightly differs from the class data. Type in the X-axis variable and Y-axis variable on the appropriate axis. Plot your results on a graph to show the . Students - watch the video and answer the questions on the student homework task sheet before your next lesson. 2 and up. The goal is to end up with four potato slices of exactly the same size, so that we can compare the effects of the water and the salt. In this lab, you will be given six unknown solutions of sugar water - a 0. They take up of lose water easily. An isotonic solution is one in which the concentration of solutes is the same inside the cell as outside the cell (STAYS THE SAME). Osmosis Potato Lab Submission Requirements include: Written Question (In this case it was provided; Hypothesis; Data table; Graph; Illustrations with labels; Conclusion that states if the hypothesis was or was not supported and is supported with empirical data collected. 8 M solution - and a potato. Diffusion is the random movement of molecules from an area of higher concentration to an area of lower concentration. To prepare dilutions: (“M” = molar concentration) Put “x” mL 1M sucrose solution in a 10mL graduated cylinder. See the rubric for the specific details. Purpose: To identify the structure. BE CAREFUL not to break the bears, they are very fragile. Add 10. The initial mass of potato is noted before being placed in the solution. Water molecules moved from the potato cells into the sucrose solution making them shrink. Part B – Potato Lab: In this lab you will determine the molarity of a potato. 4 molar sucrose, . 0 to 0. Water moves into the cell. Leave the potato in the sugar solutions for at least half an hour. Exercise 1D 15. Write a summary of the background (water potential, hyper‐,hypo‐,isotonic, etc. You should have two bars for each potato cylinder (initial and final) on each graph. Water will always move from an area with more water molecules and thus, higher water potential, to an area with less water molecules and therefore lower The Effect of Sugar Concentration on Percent Change in Mass in Potatoes. - Osmosis in Potato Chips Preliminary Experiment to investigate Osmosis 1M Sugar 50:50 0M (water) Initial mass 2. Using the class data, calculate the average percent change in mass for potatoes in each sugar solution. In order to determine if the salt in the water has an effect on the potato cells, we first need to cut four equal Prepare a graph of your data. 9. 0, the (Y) decreased the water inside cucumber moves out and it is because we put more solute (salt) graph/chart **Create two bar graphs which compare the solution (% salt water) to the length and mass of each potato cylinder. Concept 1: Diffusion; Concept 2: Osmosis; Closer Look: Osmosis; Concept 3: Movement of Molecules in Solution; Closer Look: Concentration Gradient; Concept 4: Movement of Molecules and Cells; Concept 5: Types of Solutions Based on Solute Concentration; Concept 6: Water Potential; Concept 7: Calculating Water Potential From the graph an estimate to the concentration. Materials: potato cubes, carrot slices, distilled water, sugar water solutions, salt water solutions, plastic beakers, forceps, balance, marking pen. 18. This lab demonstrated osmosis, which is the movement of water. Osmosis Diffusion Lab: Testing Sugars Laboratory 3, AP Biology Abstract. It contains a high concentration of water molecules, and due to its high osmotic pressure, At the point the graph crosses zero, which is about 1. – The isotonic point of the potato will be around 0. The experiment was conducted effectively to test the hypothesis: The larger the surface area of the potato, the quicker, the rate of osmosis, thus, greater % change of mass. Experiment to Investigate Osmosis in Potatoes - Experiment to Investigate. The percentages throughout the graph remained at or near 40% four out of six times. This hypothesis was refuted by the data collected in the experiment. Notice the differences between the eggs before and after the experiment. Push the cork borer completely through the potato. How does salt water concentration change the mass of potato slices? Diffusion and Osmosis Introduction: Atoms and molecules are constantly in motion. Purpose: to demonstrate osmosis in plant cells. Each cell is surrounded by a thin skin called a. In this experiment, students will put samples of potato tissues in sucrose. For example, potato waffles are stored in the freezer, but potatoes themselves. Osmosis/Diffusion Lab. Class practical In this investigation, you prepare a range of dilutions of blackcurrant squash. 8 concentration of sucrose, which gave us a positive number, the graph shaped similarly with other groups’ graph. Take a large potato and carefully cut one end square, then measure 8 cm to the other end and cut it square. Lab 1: Diffusion & Osmosis · Lab 2: Enzyme Catalysis · Lab 3: Mitosis & Meiosis · Lab 4: Plant Pigments & Photosynthesis · Lab 5: Cell. And since osmosis occurs down a concentration gradient, when a potato chip is placed into a hypotonic. Dialysis tubing acts as a semipermeable membrane and can recreate osmosis in action. o Volume of Glucose Solution – The more solution there is the more the glucose has to equalize over. 6 M, and a 0. 6 molar sucrose, . The potato cores started to decrease in weight as the molarity went up. In the first graph, we can see the beginning mass compared to the ending masses. Determining the Solute Concentration of Potato Cells. Then tomorrow, for the 1M beaker, remove the 4 potato cylinders. 8 M Sucrose 1. The lab is due before the start of school on Jan. Through the process of Osmosis, water will move from a region of high water potential ('concentration') to low water potential. 1%, 2%, and 4. 4: Graph Results After OH in Solute Concentration With Labeled Hypotonic, Hypersonic, & Isotonic The above graph is similar to that of Figure 1. 8 glucose, and 1. 3 the potato cell to the other, caused by the concentration of sucrose. Free research that covers osmosis potato chip experiment-lab report osmosis potato chip experiment-lab report planning (a) questions what is the effect of. : Graph Results After 24H in Solute Concentration With Labeled Hypotonic, Hypertonic, &amp; Isotonic The above graph is similar to that of Figure 1. Students calculate % change for each factor and graph the data on a bar graph. at what sucrose molarity does the curve cross the zero chnage line on the graph? 2. How could a graph of your data help you estimate the solute concentration of potato cells? HEMOLYSIS OF BLOOD CELLS Living red blood cells (erythrocytes) are good models for studying osmosis and diffusion in hypotonic, hypertonic, and isotonic solutions. Potato osmosis lab report, a lab report osmosis using a potato, lab report osmosis and potato core, diffusion and osmosis potato lab report, osmosis lab report. 7. The cell wall exerts a ‘back pressure’ which opposes the entry of water into the cell which affects the process of osmosis. Title: Osmosis in Potatoes and Carrots. To do this: i. 5% 3. 5 M. Sample Lab Report- Potato Osmosis - Download as PDF File  Lab 1: Diffusion and Osmosis Laboratory 1, AP Biology 2011 Spurthi Tarugu, Kavinmozhi Obtain a potato and a cork borer (5 mm in inner diameter). 49. 3: Potato Osmosis Results Solution Temperature Initial Mass Final Mass % Change in mass Distilled Water 0. Gummy Bear Osmosis Lab ★ Purpose: To observe the effects of _____ on a gummy bear. This lab exercise will investigate the process of osmosis, which is Science experiment 319. For . in living cells. Leave overnight. Part III. The sodium chloride is the. Hypothesis: If the potatoes are each placed in their solutions, then the water will flow from the less concentrated to the more concentrated solution, and therefore the mass will increase in the more concentrated solution. Potato cubes of different dimensions were submerged in a 10% sodium chloride solution to calculate the percent of mass difference. Make qualitative observations or calculate the percentage change in mass. 1. 5 g at the start and 2. The graph shows the percentage increase/decrease of the mass of the potato cylinders; as the glucose concentration is increased, the mass of the potato cylinders decreases. Discussion: see lab grading guidelines. Obtain 10 cups/beakers. Immerse the egg in Solution X. Record the results. 4 M sucrose, 0. 6. 1) Observe the effects of different concentrations of salt solutions on potato cores. Weigh each potato slice. In this biology classroom lab, students investigate the affect of soaking a Gummy Bear in water. Add distilled water to 10mL mark. Anything lower than the isosmotic concentration resulted in a hypertonic concentration. 2 M Sucrose 0. Large molecules, such as sugars (C. Pre-Lab: Write the following instructions for the preparation of sucrose solutions on the Pre-Lab page. To determine the cause of the sailor's death, we will determine the effects of salt water on slices of potato. Priyal Chitale IBD Year 11 Dhirubhai Ambani International School BIOLOGY LABORATORY REPORT – POTATO OSMOSIS Aim: To find the solute potential of. Science Experiment Report Osmosis Essay. Title: AP Biology Lab #1: Diffusion and Osmosis Purpose: In this lab, we will be conducting an experiment where we will observe the acts of passive transport: diffusion and osmosis. Diffusion Osmosis Lab Report. How to complete the lab report: EXERCISE 2. Graph Except for the point of potato cores in 0. 1—the membrane is the wall in the middle of the figure). If the concentration of the sucrose solution is 0. 43 Change in mass -0. This would be the sucrose molarity in which the mass of the potato chunks does not change. The water inside the potato will move OUT of the potato and make it shrink. Procedure: Cut the potato slice into two equal pieces, 3-4 cm long. Make sure you have your data: % sugar concentration and % change in mass. do not write directly on beakers. 0 (deionized water), 0. since i am not creative, i can't come up with a good creative and logical And why?! Whenever I think about it, show more Okay, so in biology class we did a lab about osmosis. Involved in this process are hypotonic, hypertonic and isotonic solutions. Continue Reading. To observe the process of plasmolysis inside living cells. When it goes to 0. This Hypothesis was not supported by the results of the lab. 40M, and 0. AP Biology Lab- Osmosis . 0 M Catchy title for an osmosis lab? i have to do a lab report and come up with a good title. 10. 2, 0. LAB Diffusion, Osmosis, and Membrane Transport Date: Name: General Biology 2 Instructor: Jose Bava, Ph. Using Potatoes for Osmosis and Diffusion Labs •Involves calculations and graphing! Win! Win! Win! Labels: cells, labs, osmosis and diffusion, science lab. txt) or read online for free. 30M, 0. 4. Carefully cut off each end of the core where the potato skin is. In this experiment the membrane will be that of the potato cell. Cut potatoes into fries with a fry cutter and weigh 12 white potato fries and 6 sweet potato fries. - Review what makes an experiment reliable and valid. In this osmosis worksheet, students put a strip of potato in three different solutions and document the changes in the potato to determine is the solutions were hypotonic, hypertonic, or isotonic. In this lab, students will investigate the properties of osmosis using potato slices. and process the data on graphs showing standard deviation bars in order to  Hypothesis for osmosis potato experiment - Osmosis lab report. Ever cut up some apples or potato slices just to see them turn funky colors and not be as fresh as they could be? What can you do to protect these fruits and  Nov 24, 2011 Remove the potato chips from the blackcurrant squash, dry and reweigh. When the change in mass is negative, the outside solution is hypertonic. Osmosis is a special case of diffusion. 2M solution were the most isotonic of all the potatoes. 4 would be a hypotonic solution, making the weight of the potato increase. Pour salt water in bowl and regular water in another. Distilled water is hypotonic. Diffusion and osmosis potato lab report. In exercise 1C potato cores were massed and placed into different molar solutions of sucrose (by class groups) overnight. Essay on Osmosis in Potato Chips. 40 2. Through osmosis, the solution moved along the concentration gradient and into the potato slice making it hypotonic. Osmosis Lab Walkthrough Mr. 7%. diffusion, osmosis, isotonic, hypertonic, hypotonic. Place the capillary- fitted potato tuber in the water- filled petri-dish. Background Osmosis is the process whereby water moves across a cell membrane by diffusion. X-axis Variable. Osmosis is defined as the diffusion of water across a cell membrane. explain how this information can be used to determine the osmolarity of the potato tuber tissue. The graph indicates a negative gradient and that the approximate concentration of sucrose inside the potatoes cells was 1. Typical graph generated by in-class results in Phase 2. Example results. Four cylinders from a potato for each solution to be used. II. 4 M, and 0. To carry out this type of experiment, you need to: To carry out this type of experiment, you need to: cut BIOL 1208 - Formal Osmosis Lab Report - Free download as Word Doc (. 30 minutes to design and conduct an experiment that uses a potato to help you . Osmosis: How Does the Concentration of Salt in Water Affect the Rate of . Moving on to the flexible test, the regular water one again feels firm and crisp (try to break the piece, it snaps!). According to our data, all the beakers caused the dialysis tubes to lose their mass and decrease in volume as a result. Distilled Water 0. 8%) in the potato soaked in the 0. 2 Experiment to demonstrate osmosis in living tissues Materials 3 irish potato halves (raw) 3 petridishes 2 tea spoonfuls of salt. In order for a living organism to be at homeostasis, substances such as food and water must be able to move into or out of the cell. You will need 30 potato cubes. Record the weight of each egg in a notebook or on your computer. The general trend for the graph is that it starts high on the left and slopes down to negative values on the right. Identify the following: Independent variable = Dependent variable = Control Group = 3. Use the forceps take out each chip in turn, carefully blot it dry without squeezing, and remeasure the piece. Write observations for what your potato looks like in each of the beakers (should be the same on Day 1!) Tomorrow, you need to first make observations – record how the potatoes appear. Osmosis lab/ concentrations of solutions effect on potatoes mass. Since the solute concentration of outside solution is known, one can determine the concentration of solute in potato cells by the change in weight after it reaches equilibrium. < Osmosis & Diffusion: The Lab - introduction Osmosis & Diffusion: the Lab - Materials > Powered by Create your own unique website with customizable templates. Step 4: Take a potato and after peeling it with the knife, cut it into 10 same size small pieces. Key Concepts. The Effect of Sucrose Concentration on Osmosis by Serena Zhang (Experiment done and results analyzed from December 2 - December 10, 2015) Results Each group put slices of potatoes in solutions with different solute concentrations (in mol/L) of sucrose: 0. Heat one of the solutions in the microwave for about 30 to 45 seconds, until it is warm. The paper must. In this lab you will be using an egg with the shell removed, a “naked” egg. . 175M. Biology Lab Report 2 Investigating the phenomenon of Osmosis in plant. Osmosis is the key to understanding this issue. Potato Osmosis Lab Report. Draw a line of best fit for the plotted points. This lab is derived from the AP Biology lab on Diffusion & Osmosis. Lab Overview •According to your lab manual, there are three parts to this lab. 2 M sucrose, and 0 M sucrose. POTATO OSMOSIS LAB During this lab you will be investigating osmosis using potatoes. He then describes the diffusion demonstration and how molecules move over time. Ask the instructor if you are unsure how to draw your graph. Place one slice flat side down in salt water solution and the other slice in the regular water. Answer to Diffusion and Osmosis Lab 1. 11. This is due to the fact that the sucrose solution was hypertonic in comparison to the potato slice. The graph shows this pattern as a gradual trend. Osmosis - Potatoes 1 INTRODUCTION 1. 85 2. The shell-less egg will potato skin could be left on affecting the results when blotting the chips after osmosis, theres a risk of forcing water out of the cells, affecting the change in mass I forgot the rest lol, need to look over my notes. 50. However, the potatoes started losing weight in the sucrose solution of 0. c. At this sucrose concentration the sucrose solution is isotonic relative to the potato tissues. 45,124 Ib biology lab_report_sample npopova. Calculate the change in mass and record findings in your table. 4 M (of sucrose) then the % change in mass will be zero. A second powerpoint to re weigh the potatoes and draw a graph. salt. He then explains the concepts behind the osmosis lab and how potatoes are affected by increasing sucrose molarity. From the results plot a graph. 0, the (Y) decreased the water inside cucumber moves out and it is because we put more solute (salt) Variety of Potato – Different varieties of potatoes may vary in the quantity of water and/or glucose in them. This simple inquiry-based lab was designed to teach the principle of osmosis . Using this method, Cylinders or discs of fresh potato are often used to investigate osmosis. This membrane forms a selective barrier between the cell and its environment (see Figure L3. Introduction  Oct 10, 2013 3 Diffusion and osmosis through a selectively permeable membrane In this experiment you will use potato cores placed in different molar Graph the results (molarity of sucrose solution versus percent change in mass). In an isotonic solution, there is no net movement and there is an equal concentration of solutes and water. Graph: Percent Change in Mass of Potato for each sucrose solution Lab 1 C- Analysis of Results 1. To find out the molar concentration in the potato core, we can graph the data and analyze the relationship between the percent change and molarity. Where graph crosses the original length value for the potato, make a 90-degree angle and read value on the X axis. 15. 21 0. 2 and seeing that an isotonic state is when the potato cores are submerged in a . 2M sugar solution. An egg osmosis diffusion lab report 8 ap bio lab report cell membranes biology lab answers 696 reads state university. 39 -0. When the potato is placed into isotonic solutions, this means that the water will move into and out of the potato at the same rate and there will be no structural change. 0. This happens when water moves out of the cells by osmosis. Prior to the experiment, write an introduction designed to answer the following. If you put a potato into an isotonic solution it should remain the same weight, but if you have more solute in the water than in the potato, water from the potato will be drawn out (like salting a snail or tomato), but if the water has less solute than the potato, it will be drawn into the potato, making it heavier. Docx from BIO 105 at potato osmosis lab report Eastern Iowa Community College District. For our purposes we will consider the membrane of the potato to be selectively permeable to H2O only. From graphing these results, a linear forecast line was drawn to find where, according to these results, the x-intercept was; allowing the concentration of sucrose of the potato cell to be found. (10) Finish Potato Osmosis Lab (15) Clean-up (10) Wrap-up/Homework (5) Homework- Complete Lab Write-up. Plot the points: x axis = y axis = 4. c) information pertinent to the investigation (how solutions that are hypertonic, hypotonic or isotonic to the cells) Sine water always moves from high water potential to low water potential, water was lost from the potato cells. 9% salt concentration, is a little less salty than seawater , which has a salt concentration of about 35 parts per thousand (3. Out of all six test tubes, the 1. In this experiment the semi-permeable membrane is the cell (surface) membrane. Peel a potato. Determine the mass difference, the percent change in mass and the class average percent change in mass. 8, and 1. This worksheet has 6 short answer 13. •You will be doing this as a lab table group (not partners). Graph: Percent Change in Mass of Potato for each sucrose solution Lab 1 C- Analysis of Results. Osmosis is defined as the manner in which molecules pass through a membrane into a more concentrated solution. The hypothesis for this experiment was that at 0m and at . Then you will set up an experiment to test osmosis under different conditions. 4 M glucose, 0. In a living cell, active transport means osmosis continues (the gradients are continually being created) Conducting Lab Using Probes and Computers/Calculators. However, it’s Osmosis Potato Lab Report Biology Paper If the two solutions are of equal concentrations, they will be isotonic. Investigate the processes of osmosis in a model of a membrane system; Investigate the effect of solute concentration on water potential as it relates to living plant tissues ; Exercise 1 - Osmosis Across a Membrane. - Determining the Water Potential of Potato Cells. Graph results (sucrose concentration x axis, %change in mass y axis). Without this water there is little pressure inside the cells and the plant can no longer support itself against the pull of gravity. Plant cells and their reactions to different solute concentrations are observed and recorded in order to create a relationship between diffusion & osmosis and tonicity. If your results in this experiment differ from the expected, explain what went wrong. doc / . 0 M Sucrose Analysis of Results: Answer all of these questions in their own section of your lab report. 1) The line graph of the data collected shows the least amount of change in mass (1. We recorded the cores' initial mass, placed them in sucrose solutions of varying molarities, and then weighed them one day later. 4 molecular concentration because potatoes are more moist than other vegetables. Cut out two slices from a potato and place each one of them in one solution. 1 M, 0. The rate of water movement in osmosis can be observed with an osmometer (see figure below). Answers to osmosis discussion questions: "Why is there are change in mass, length and texture in potato strips immersed in water or salt/sugar(hypertonic solution)?Estimate / determine the water potential of potato tissue equivalent to a particular. 3M solution, since there is no net movement of water and no change in the potato core mass. water molecules and therefore through osmosis water molecules moved across the membrane from the egg into corn syrup thereby leading to decrease in weight and size of the egg which is obvious from the table. pdf), Text File (. Zucchini cores also have a higher concentration of sucrose in them than potato cores. 6 M : 0. According to our data, the isosmotic concentration, of a potato tuber disk is around 0. Answer 1: "Use a large, cork borer and a large (long) potato. Graph Data. of the Cell Sap 4. 4 M : 0. Using your graph to predict the mass of a 10 gram potato section placed in a sucrose solution of 0. 14. The water in their cells diffused outward into the saltwater, Method. 50M. Investigate the effect of solute concentration on water potential as it relates to living plant tissues. Data is collected and analyzed by using the Texas Instruments TI-82 graphing calculator. For each trial, in 6 plastic cups, pour 100mL of water, combine the sugar that in which corresponds to the percentage of sugar. Potato osmosis lab report In this experiment, pieces of potato will be placed into liquids of different. Osmosis is a special type of diffusion; it is the diffusion of water across a selectively permeable membrane. concentration of blackcurrant squash on osmosis in chipped potatoes . Obtain 5 small beakers and label each as distilled H. They have low water molecule concentration, and thus they have low osmotic pressure. Osmosis occurs in the cell of living things. Place a scale on the vertical axis for percent change. Find the best essay sample on Osmosis Potato Lab Report Biology in our leading paper example online catalog! & Isotonic The above graph is similar to that of Prior to teaching this lesson, students should be taught about osmosis and its importance to cells. Diffusion & Osmosis Lab Review Worksheet - Winnie Litten Lab 1 Osmosis. If water moves out of the cell, the cell will shrink. 6 M glucose, 0. Osmosis lab of potato in three types of water masahiromaed. Allow these potato samples to sit immersed in the solutions overnight, covered. Osmosis Lab Introduction: Homeostasis is the process of maintaining a constant internal environment despite changing external conditions. SUBMIT the Osmosis Lab Report When complete, proceed to the NEXT page. 8 Molar (0 Molar) Observations. 4 M. Adjust the size of the graph to fit your page appropriately. Conversely, they will lose water when in concentrated solutions, such as those containing a great deal of starch. 8 molar sucrose, and 1 molar sucrose. A third ppt with just 2 slides to give pupils more guidance when writing the hypothesis (lower sets) Read more. Objectives: Osmosis / Diffusion Lab 1. At this point water continues to flow but the rate in = the rate out. This is because there is a lower concentration of sugar outside the potato cells and water will rush in. Place it in the tray. In order to draw any conclusions, the potato slices must be exactly the same size to begin with. Osmosis is the process in which water molecules diffuse through a selectively permeable membrane from a high water concentration (which means lower solute concentration) to of a low water concentration (higher solute concentration) until the solute concentration reaches equilibrium. 2 and 1. EXERCISE 1. Adding 20 ml of each solution into separate bags and then weighing their mass gathered the information for the first lab. Osmosis Lab Introduction : Human blood, at 0. My whole life. Osmosis Lab Report Osmosis and diffusion are the very essential at both the organ and cellular levels. Part 1: Report your observations of osmosis in potato strips. Bio 13A Lab Manual Activity 2B: 1. During the experiment I noticed that the potato pieces of which were placed in the most concentrated sugar solution generally floated to the top of the test tube. This is because for distilled water and the low  Osmosis - Potatoes 1 INTRODUCTION 1. You will be sharing your data by writing a formal lab report. Osmosis Experiment For Kids: Potato, Water, and Salt June 17, 2014 by C. 1%, 2% and 4. Abstract. However since almost each dialysis tube has lost a different amount of mass, Please help! Osmosis coursework hypothesis watch. The potatoes left in salt water, however, experienced the opposite effect: They withered and became soft. 4 Molar 0. Conclusion: a. Surface area of the potato plug – It may make the process of osmosis slower, if a large potato plug is used in the experiment. One segment of the lab is the classic starch/IKI/glucose/dialysis tubing experiment, and the other uses core samples of potato in varying concentrations of sugar-water to measure water potential of the potato cells. The plus sign shows that it has gained mass - it will have gained water by osmosis. 8 M : 1. Then multiply answer by 100 Class Average for each Plot data Graphing Data Osmosis Diffusion Lab 2 Potato Lab Problem: Which solution is isotonic to the concentration of sugars inside the potato cell? Design a protocol Given concentrations 50,75 100, 125, 150 g/L of sugar, how would you use these to find the concentration of the potato cell? Plants with too little water will wilt. According to the graph, the cells being tested have a water potential that is  Find the best essay sample on Osmosis Potato Lab Report Biology in our leading 4: Graph Results After OH in Solute Concentration With Labeled Hypotonic,  Lab 3. Potato OsmolarityAgain Hi, after doing a diffusion/osmosis lab, I am being asked to determine the osmolarity of a the potato cores. The gummy bear left in salt . Open excel by  Answers to osmosis discussion questions: "Why is there are change in mass, length and texture in potato strips immersed in water or salt/sugar(hypertonic  Mar 30, 2015 Biology:( Osmosis and Diffusion Lab using Potato Cores (Class:( 3B Mr. Lab report. The salt water potato is bendy and doesn’t snap at all. My biology class has just completed a practical activity on osmosis. Writing college application essays is crucial for your academic future The Common Application is a site used by hundreds of colleges and universities in the United States Determining Molarity lab Background: Osmosis is the diffusion of water across a semipermeable membrane. Scribd is the world's largest social reading and publishing site. Potatoes are water based, and are easily influenced by the environment around them. Hypothesis If temperature increase then the osmosis rate will be faster because water molecules will move. 6, 0. Part V: Onion Cell Plasmolysis Introduction: Osmosis is the spontaneous net movement of solvent molecules through a partially permeable membrane into a region of higher solute concentration in the presence of water. Determine the molar concentration of the potato chunks. If you don't know what these terms mean, this lab is not going to make sense to you. If water moves into the cell, the cell may . Procedure: Carrot slices in salt solution 1. Create a graph from the potato osmosis data to estimate the internal molarity of the potato cells. To determine concentration of overall solute in potato cells, wait until the potato cylinders reach equilibrium and measure the change in weight. •We are doing two of them –Procedure 1 and Procedure 3. Looking at our graphs and the correlation coefficient (R2), which helps us identify in all  Oct 12, 2012 Osmosis and Diffusion Lab Report Introduction All Cells Contain Based on the data from the graph, the osmolarity of the potato was 0. Use a descriptive title that explains the contents of the graph: The one in the regular water looks like a nice white freshly cut piece of potato. Measure and cut a 3 cm long potato core section. During osmosis, water molecules move through a 8 Answers. Diagram Solution Test tube. They then develop a new, A: According to Clemson University, the molarity of a white potato is estimated between 0. 2 M glucose, 0. There should. ) b. The solutions we used were: distilled water, . 6, the graph is above so it clearly shows that the water moves into the cucumber because inside the beaker, there was more solvent than the solute. 5M, Lab 1: Osmosis & Diffusion. OSMOSIS & DIFFUSION: THE LAB - Discussion & conclusion. –Procedure 3 is an investigation of osmosis in potato cores. I will also be using the same type of potato during the experiment to avoid any anomalous results as a different potato may affect the rate of osmosis. Our lab procedure was to take five equal potato core pieces similar in weight and place each in a different beaker which has the five different sugar solutions. at what sucrose molarity does the curve cross the zero chnage line on the graph? In More Dulute Concentrations Of Sucrose, The Weight Of The Potato Piece ______(increases/decreases) After  Sample therein lab osmosis report potato seems am est i write essay essays in Such change climate a scrtion From the graph an estimate to the concentration. 6M beaker. Osmosis in potato cells Aim: To view and examine the effect different concentrations of sucrose solution has on the movement of water across the cell membrane. Potato chip. In our lab, we modeled diffusion and osmosis with a hospital scenario. 8. You will be testing 5 different molarities of two different solutions. DEMONSTRATION OF OSMOSIS USING VISKING TUBING. You will use two different solution. Zucchini cores placed in sucrose solution at 27 ° C resulted in the percent changes below after 24 hours. Osmosis is the movement of a solvent across a semi-permeable membrane from an. Osmosis 1 OSMOSIS By: Shelby Lazorka Lab Partners: Laurel Miner and Kristi Raible Biology 120-949 Professor Aguayo October 31, 2012 2. In this lab you will observe diffusion and osmosis. The osmolarity of the potato can therefore be determined by analyzing the change in mass of the potato cylinders. 84% : Graph Results After 24H in Solute Concentration With Labeled Hypotonic, Hypertonic, &amp; Isotonic The above graph is similar to that of Figure 1. Also label on tape – your group name. Water moves from areas of high potential (high water concentration) and low solute concentration to areas of low potential (low water concentration) and high solute concentration. 1 SUMMARY In this experiment, we are trying to find the isotonic point of potatoes by soaking them into different. 00M, 0. When doing this experiment I was able to see the effect of differentconcentrations on the rate of osmosis, each trail was done by measuringthe initial mass of the potato cylinder and after Transcript of AP Biology Lab: Osmosis and Potatoes. Diffusion & Osmosis Lab This lab explores the process of osmosis and diffusion in cells, and the impact of tonicity on this process. This kinetic energy causes the molecules to bump into each other and move in different directions. 31 when it is submerged in a sorbitol solution. Top 6 Experiments on Osmosis (With Diagram) Some of the experiments are: 1. Each beaker contained 50 mL of the colored solutions. To determine the isotonic point and various unknown concentrations of a sucrose solution with the aid of potatoes. Punch a total of 4 potato cores, each 3 cm in length. 2 Molar 0. However since almost each dialysis tube has lost a different amount of mass, BIO181 Lab Manual EMCC Spring 2011 Created by Smith/Steele Page 34 of 168 1/6/2011 Using the graph paper provided on page 29, graph your data following these directions: 1. Prepare stock salt solutions in advance (1%, 5%, 10%) Peel and core potatoes (cores should be approximately 3 cm long) Prior to lab, measure 100mL in a measuring cup if you do not have beakers available. The gummy bear left in salt water will shrink swell stay the same. A way that we can use osmosis is to determine the molarity of substances. Blot dry by placing bear on a paper towel. Explain your response. ( The graph should decrease, but our graph was decreasing and  Free research that covers osmosis potato chip experiment-lab report osmosis Graph the increase and decrease in mass of the potato cores according to the. The salt water will cause the potato to shrink due to the effect of osmosis. Lab Investigation. Place the beakers on the AP lab benches – check if your group name is on the labels. Observe the effect of osmosis in potato cells in solutions with different temperatures. OBJECTIVES . Include the table of Obtain a potato and peel the potato. Cut potato chips, weigh them and place them in the various solutions. Cell Homeostasis Virtual Lab What happens to a cell when it is in different environments? Figure 1. Cut it up into equal size cubes approximately 1 cm3 . Demonstration of Osmosis by Osmoscopes 3. This motion is the fuel for diffusion. A graph of change in mass (vertical axis) against concentration of sucrose (horizontal axis) can Subtract the weight of the bowl from the total. Since you must do this to several potatoes, the idea is to use the same size borer on each potato. Lab Report: Osmosis. Demonstration of Plasmolysis and Determination of Isotonic Conc. 8 M sucrose, 0. If a 10g piece of potato were placed in sucrose solutions of 0. Accumulate 1 white and 1 sweet potato. Introduction The cytoplasm and extracellular environment of the cell are aqueous solutions. 4 g/100mL salt, the solution is isotonic, meaning the water potential inside potato is equal to the solution, to at that point there is no net Science Experiments on the Osmosis of a Potato. Using the same size potato. :ConclusionTo wrap this experiment up I can say that the trails that were done oneach of the 5 different concentrations were repeated for eachconcentration 5 times for higher accuracy. Paul Andersen starts with a brief description of diffusion and osmosis. Summary. Select Next after you have previewed your graph. Please try again later Lab 1: Osmosis & osmosis potato lab report Diffusion. They collect measurements of height, width, and mass before and after the soaking of the candy overnight. Osmosis will occur. 34 Final mass 2. Osmosis is the tendency of water in salt water to flow from an area of low salt. 17. 6 The Term Paper on Osmosis In Potato Cells of different concentrations of sucrose solution during the process of osmosis across potato tissue and to discover the water potential of the potato cells. This process involves the movement of water, through a semi-permeable membrane, from an area of high concentration to an area of low concentration. Record. b) introduce and describe key terms and concepts, but write in story/ report form rather than as a list of words and definitions. Paris Osmosis is the chemical process of diffusion, involving the transfer of solvent with a lower concentration of a certain solute through a semipermeable membrane, and into the area containing a higher concentration of that solute. Hypothesis: That the potatoes will either increase or decrease in mass, due to the effect of the different concentrations. Table 1. 0 g at the end. Remove the cores, blot off excess solution, and weigh the samples, recording the mass in the data table. What the experiment was testing c. Osmosis is the movement of the solvent molecules from the region of higher concentration to the region of lower concentration through a semi permeable membrane. my professor gave me a higher grade but the grade isn't what I’m concerned about i like being able to create a master piece with all the assignments that are given to me. If the concentrations are unequal, the solution with the higher concentration is hypersonic, and the solution with the lower concentration is hypotonic. Lay the core next to a metric ruler. If it is sealed at one end, attached to a glass tube, and filled with a liquid such as sugar solution, and immersed in another liquid such as water, then water should pass through the visking tubing and cause the level of liquid to rise inside the glass tube. Explain that the halves placed in fresh water soaked up the water into their cells by osmosis -- diffusion across their cell membranes. By graphing the percent change in mass of potato cores placed in varying molar concentrations of sucrose (graph 1. Lab 1: Osmosis & Diffusion Osmosis is a type of diffusion. BIOL 1208 Lab Report Cover Sheet. This is again the definition of osmosis, which is a recurring theme in this lab. Sample potato osmosis lab report. Plot a graph of either absolute change or percentage change in weight/length v molarity of the sugar dilution. Potato osmosis lab: Graph, sample calcs, background, variables, controlled variables 12/08/17: B1: Lab report and 1. 4 mc is the isotonic point, the concentration lower than 0. Osmosis. Mark the solution level in the tube and watch the experiment for some time. 3) Use a line graph to display data and draw conclusions. Potatoes are full of both water and starch, and will gain water when immersed in watery solutions. Biology Lab: Qualitative and Quantitative Plasmolysis. 4) Observe plasmolysis in Elodea. Molarity stands for the number of moles of a solute required to dissolve in one liter of a solution. 2m the potato core was going to swell making the surroundings it was in hypotonic. Prepare salt water solution by adding 30 ml of salt to 70 ml of water. Part 2: You will have a class data table that you will get from the teacher the day after the lab. • Potatoes. Diffusion And Osmosis In Potato Cells Pre-lab Question: The Accompanying Graph Shows The % Question: Diffusion And Osmosis In Potato Cells Pre-lab Question: The Accompanying Graph Shows The % Change In Weight Of Potato Disks In Several Solutions With Different Sucrose Concentrations As A Function Of Time. Today Make graphs in excel Presentations- 3 presentations per treatment Potato experiment Glycols (Bovine) Propanols (Bovine) Writing Assignment 2 errors Writing Assignment 3 ( Due October 27) Lab Report (Due November 17) The masses of the potato cylinders increased, however, when they were soaked in distilled water, or the hypotonic solution. Graph the data collected in the osmosis exercise and use the graph to estimate the solute concentration inside of the vegetable. In this graph, the change in mass of potato cores decrease as the sucrose molarity increases except for one outlier within the . Measure the length, width, and height. Agenda: DAY 2: Do Now (5) Review of yesterday’s material. Repeat for the remaining dishes. Therefore, water will slowly leave the cells of the potato and enter the sugar solution in an attempt to reach equilibrium and the potato will therefore lose mass. 6 M sucrose, 0. Osmosis helps regulate the amount of water in an organism's cells to help it keep cell shape and function for the health of the whole body. Osmosis Lab. Your instructor will  Free flipped learning lesson plan on the osmosis in potato strips experiment. potato osmosis lab graph

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