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Investigating the Effects of Sucrose Concentration on the Mass of Potato Chips

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Investigating the Effects of Sucrose Concentration on the Mass of Potato Chips

The aim of my experiment is to investigate the effect of varying the

concentration of sucrose on a potato chip. I aim to observe the change

in mass, and I hope to view what happens to the chips as the

concentration increases, and I hope to see the effect that osmosis has

on the chip.

The experiment that I am conducting uses the process of osmosis.

Osmosis is the movement of water molecules across a partially

permeable membrane from a region of high water concentration to a

region of low water concentration. Partially-permeable membranesare

very thin layers of material which allow some substances to pass

through them but prevent other substances from passing through. For

example, a partially permeable membrane may allow water molecules to

pass through it, but may not allow larger molecules such as Glucose to

pass through. An example of a partially permeable membrane is visking

tubing, which is also known as 'dialysis tubing.' Visking tubing is a

partially permeable membrane with tiny pores, which allows small

molecules such as water to pass through but does not allow larger

molecules such as sugar. If solutions of different concentration are

on either side of the visking membrane, water molecules will pass

through and tend to dilute the more concentrated solution, hence the

idea of osmosis. Below is an example of osmosis. There is one section

of a beaker containing a solution of water and glucose molecules. The

other side of the beaker contains just water molecules. In between

both liquids is a partially permeable mebrane separating the two.

Partially permeable membrane.

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Glucose molecules

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Water molecules

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THE NET MOVEMENT OF WATER MOLECULES

Cell membranes are exactly the same as partially permeable membranes.

Cell membranes will allow small molecules like Oxygen, Water, Carbon
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