Osmosis In Potato Lab Report

1667 WordsOct 3, 20177 Pages
I. Title: The Water Potential of Potato Cells. II. Purpose: The purpose of this experiment was to investigate the effect of the change in concentration of sucrose on the rate of osmosis in cylinders of potatoes. This would happen by using similar sizes and lengths of potato cylinders and applying the into different concentrations of sucrose (0,10%,30%, 50%, 70%) in foam cups then measuring the change in mass of the potato cylinders afterwards. Maintaining all variables unchanged such as pH, same size, covered solutions, and a constant temperature. The time taken for all potato cylinders will be 24 hours. III. Introduction: In animal cells, the movement of water into and out of the cell is influenced by the relative concentration of solute…show more content…
Lastly, type of tissue was controlled by using only one type of tissue which is the same potato. The hypothesis is that when cells are put in a solution with a different water potential than inside of them, cells will gain or lose water. If concentration of solution is the same, there will be no change in mass. IV. Procedure Materials- 5 Foam cups. 5 labels A potato Cork borer 5 solutions Plastic wrap Weighing scale Paper towels Plastic knife Procedures stated- 1. 5 sucrose solutions were made of increasing molarity: 0.2 M, 0.4 M, 0.6 M, 0.8 M, 1.0M. 2. 50 mL of each unknown solution were poured into 5 separate cups. A slice of potato was placed into 5 equal cylinders. 3. The mass of the 5 potato cylinders were then recorded. 4. The cylinders were placed into the foam cups with solution and covered with plastic wrap. It is to be left overnight. 5. The room temperature was recorded in Celsius. 6. The cylinders are then to be removed from the cups and carefully blotted of any excess solution. 7. The mass of the potato cylinders were recorded afterwards. V. Data and analysis Potato (cylinder) mass unknown solution intial mass (g) final mass (g) mass difference(g) % change in mass a 2.21 1.69 -0.52 -24% b 2.2 1.36 -0.84 -38% c 2.24 2.56 0.32 14% d 2.25 1.73 -0.52 -23% e 2.15 2.13 -0.02 -1% f 2.23 1.52 -0.71 -32% Let potatoes in the solution set for 24 hours. When 24 hours have
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