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Investigating the effect of sugar solutions on the size of potato chips.

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GCSE Biology Coursework:- Investigating the effect of sugar solutions on the size of potato chips Plan: I will be investigating the effect of varying concentration of a certain sugar solution on the amount of osmotic activity between the solution and a potato chip of a given size. Hypothesis: Osmosis is a net movement of water molecules (or other solution molecules) from a region of high concentration to an area of lower concentration through a partially permeable membrane. This will take place until the area of the molecules reaches a state of equilibrium, which is where the molecules are evenly distributed. ...read more.


They are: * The size and weight of the potato chips. * The same temperature * Duration of experiment *Solution volume However, the only variable I would change in order to obtain results, is the concentration of sugar solution Equipment List: * 1 Racks * 6 Test tubes * Molar Sucrose and distilled water * Potato * Cutting Tile * Knife * Cork Borer * Plunger * Measuring cylinder From my preliminary investigation I have set out a method for this investigation. Method: 1. Collect three average sized ground potatoes of same variety. ...read more.


Prepare the solutions of concentrations 0 molar, 0.2 molar, 0.4 molar, 0.6 molar and 0.8 and 1 molar. Pour into the test tubes in percentage ratio giving the various molar concentrations. 6. Then put the chips into the tubes, and record the time, which might be needed for future purposes. 7. Allow the chips to stay in the test tube racks for approximately 24 hours. 8. When bringing out the potato chips, record the time. Then dry all potato chips then weigh them. Dryness is needed so that the weight of the potato chips is accurate. 9. Repeat the experiment for accuracy. Prediction: I predict that the lower the concentration of sucrose the higher the growth rate. ...read more.

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