The Effects of Sucrose Concentration on Osmosis in Potato Chips

The Effects of Sucrose Concentration on Osmosis in Potato Chips

Problem

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What is the effect of sucrose concentration on OSMOSIS in potato

chips?

Introduction/Plan

Osmosis is the diffusion of water from a dilute solution to a more

concentrated solution through a partially permeable membrane that

allows the passage of water molecules but not solute molecules.

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Pure water Sugar dissolved in water

We can investigate this by placing a potato chip into pure water and

weighing it before and after it is placed in the beaker of liquid. I

then will gradually increase the concentration of the sucrose solution

to see what effect this will have on the mass of the potato chip.

Independent Variable

· I am going to change the concentration of the sucrose/sugar

solution.

Dependent Variable

· I am going to measure the mass of the potato chip and the amount of

liquid in the beaker.

Controlled Variables

· To make this a fair test I will need to make sure I:

· Use the same size of chip (2mm)

· Get rid of excess H2O

· Use the same volume of solution (25ml)

· Use the same surface area

Prediction

I predict that at the start of the investigation, the mass of the chip

will increase, but later the mass of the chip will begin to decrease.

This is because the water moves from a dilute solution to a more

concentrated solution. This is known as osmosis.

The reason the mass of the chip gradually increases at the start is

because there is a high concentration of water outside the chip and a

low concentration within the chip. This causes the water to enter the