Potato Osmosis Lab Report

721 Words2 Pages

Introduction
It is a process where a fluid will transport itself through a semipermeable membrane, going from an area low in concentration of solute e.g. salt, to an area where the solute is a higher concentration. After this has taken place it ends with there being equal amounts of fluid on either side of the barrier that makes a state known as isotonic.
Plants have a strong and rigid cell wall that is on the outside of the cell membrane which is what stops the cell from opening when water is absorbed into it by osmosis. Osmosis causes the cell membrane to become even more rigid and inflated.
Osmosis in animal cells is where it will shrink and become crinkly due to any water that is leaving the cell continuously, and if it carries on entering …show more content…

The first test tube, contained pure distilled water, two to five had different concentrations and the sixth had pure Ribena. After the slices were put into the tubes they were left for 15 minutes and dried off with a paper towel and re-weighed. Both the weights recorded before and after were put into a table and the percentage of the weight differences was calculated and noted down.
Resources/apparatus
For this experiment, a range of equipment such as Ribena, uncooked potato chips, scalpel, beaker, distilled water, 2x teat pipettes, ruler, measuring cylinder, 6x test tube, test tube rack, lab coat, surgical gloves, a balance and a white tile was used.

Results
The results were put into a table showing how much distilled water each test tube contained, the weight of the uncooked potato slices before and after being added to the test tubes and the percentage that was worked out by X 100.
Potato Dilution Weight Before Weight After % of Change
1 0% 4.76 4.89 +2%
2 20% 5.32 5.22 -2%
3 40% 3.72 3.55 -5%
4 60% 3.05 2.88 -6%
5 80% 4.37 3.99 -9%
6 100% 3.14 3.23

Open Document