osmosis

Osmosis Coursework


Planning

Aim

The aim of our experiment is to find out how the strength of a sugar solution affects potato cells through osmosis.

Method

1. Cut out potato chips, making sure every piece is skinless, the same length (40mm) and the same diameter (6mm). The length was measured with a ruler and a bore was used to ensure the diameter was consistent.

2. Mix up distilled water and 1.0M sugar solutions, to make mixtures with known molar contents using measuring cylinders.

Volume 1.0M Sugar solution Volume distilled water Molar Content
50.0ml 0.0ml 1.0
37.5ml 12.5ml 0.75
25.0ml 25.0ml 0.5
12.5ml 37.5ml 0.25
0.0ml 50.0ml 0.0

3. Put a single potato chip in with 50 ml of each solution.

4. Leave for sufficient time for osmosis to happen. How long is needed will be determined in a preliminary investigation.

5. After leaving measure lengths of the potato chips to see if this ha...