Investigating the effect of salt concentration on potato tissue

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Investigating the effect of salt concentration on potato tissue

Osmosis

Osmosis is the movement of water molecules from an area in which they are at a high concentration to an area in which they are at low concentration through a semi-permeable membrane.

I am going to now investigate the effects of Osmosis on chips!

Preliminary Experiment

1. I will firstly cut two chips all approximately the same size using a scalpel (Be careful with the scalpel)

2. Then I will pour distilled water into a test tube.

3. Then I will pour approximately the same amount of salt water into a different test tube.

4. Then I will weigh the two chips on a balance.

5. Then I will put each cheap into one of the test tubes.

6. Approximately 20 minutes later, I will take the chips out of the test tube and dry them.

7. Then I will weigh them again on a balance and note down the new weights.

Results of preliminary experiment

Chip

Before Osmosis

After Osmosis

Difference

1 (pure water)

3.38

3.57

+0.19

2