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.

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From this information, I think that the lower the concentration of sugar in the solution, the lower the mass of the potato would be. This is because the water molecules in the solution would be able to diffuse into the potato chips, however the sugar molecules are too large to pass through the partially permeable membrane of the potato chips.        

In order to maintain an accurate investigation, I must maintain the same variables for all investigations. They are:

 The size and weight of the potato chips.

 The same temperature

 Duration of experiment

Solution volume

However, the only variable I would ...

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