Investigate how the Concentration of Sucrose Solution affects the Massof the Potato Chip

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Investigate how the Concentration of Sucrose Solution affects the Mass of the Potato Chip


To find out how the concentration of sucrose solution affects the mass of the potato chip left in the solution for one day.

Water Potential:

The water potential of a solution is a measure of whether it is likely to lose or gain water molecules from another solution. A dilute solution, with its high proportion of free water molecules, is said to have higher water potential than a concentrated solution, because water will flow from the dilute to the concentrated solution (from a high potential to a low potential). Pure water has the highest possible water potential because water molecules will flow from pure water to any other
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A low concentration of sucrose in ratio to water will make the potato increase in length and mass.

I predict that when the sucrose concentration is low the potato chip will gain mass. This is because there will be a higher water concentration in the potato chip so water will go into the potato from the solution. I predict that when there is a high concentration of sucrose the potato will lose mass. This is because there is a higher concentration of sucrose solution compared to that in the potato chip so water from the potato will go into the solution to even it out.

In my experiment I will have a test tube with a potato chip in. The outside wall of the potato chip is selectively permeable so it lets water pass through it but not bigger molecules such as sucrose. In the test tubes I will put different concentrations of sucrose solution
When the concentration of the solution is lower than that in the potato, water will pass through the selectively permeable wall into the potato. The mass of the potato chip increases.


Concentration Initial mass Final mass Change in mass % change

0 0.91 0.96 0.05 5.50 0.1 0.92 0.94 0.02 2.17 0.2 1.14 0.83
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