To investigate the effect of different concentration of a sugar solution on the amount of osmotic activity between the solution and pear pieces of a given size.

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Osmosis coursework

Aim: To investigate the effect of different concentration of a sugar solution on the amount of osmotic activity between the solution and pear pieces of a given size.

Define osmosis: Osmosis is a net movement of water/ solution molecules from a region of high concentrated area to a region of lower concentrated area through a semi-permeable membrane which lets smaller molecules such as water through but does not allot bigger molecules like glucose to pass through. The molecules will continue to diffuse until the area in which the molecules are found reaches a state of equilibrium (evenly distributed).

Hypothesis: In this investigation, I predict that the lower the concentration of sugar in the solution, the higher the mass of a pear will be. This is because if I place a pear in a high concentration of sugar solution, the water molecules from the pear will diffuse through to a region of high concentration of sugar solution in order to dilute it. The sugar molecules cannot enter the pear as they are bigger molecules so therefore the pear will have a smaller mass.

I will also going to use water (neutral) as part of