How Does Sucrose Affect Osmosis Experiment

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Osmosis Investigation

Aim the aim of this experiment is to investigate the effect of changing the concentration of sucrose on the rate of osmosis in cylinders of potatoes.
This would happen by using similar sizes and lengths potato cylinders and applying them to different concentrations of sucrose(0%, 10%, 20%, 40%) in small beakers then measuring the change in mass of the potato cylinders afterwards. Maintaining all variables unchanged such as pH, same size, and a constant temperature. time taken for all potato cylinders will be 30 minutes.

If the potato cylinders were put in sucrose concentration where the water potential is higher than the water potential that of the potato itself that would cause the mass of the potato to
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I can control this by measuring and getting the right amount of sucrose.

Dependent Variable:
The change in mass(grams) of the potato cylinders before and after the experiment.

Controlled Variables

SA/V Ratios:
To be able to balance different SA/V ratio to limit its effect on the rate of osmosis one must first measure the sizes using a ruler as well as using a cork borer to maintain the same diameter for each cylinder but changing the length of the cylinders themselves.

Temperature is one of the factors that affect osmosis, due to the existence of more kinetic energy as temperature increases meaning more effective collisions so we start by using temperature to maintain the same set temperature for each investigation performed by using a thermometer to monitor.

Type of tissue: the type of tissue has a certain effect on rate of osmosis since the amount of glucose in each type of tissue differs. This will be controlled by using only one type of tissue which is the same potato.


1 large potato piece
1 cork borer
1 scalpel
1 clear plastic ruler
4 small

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