Potato Osmosis Lab Report

Osmosis Lab Conclusion

The purpose of this lab is to determine whether salt affects the movement of water in the cell. Independent variable is the factor that affects the value of variables dependent to it. In osmosis lab, the independent variables are the potato and onions. The dependent variable is the variable whose value is measured to determine the extent of the effect of another variable to it, as in an experiment. In osmosis lab, the dependent variable is the length of the potato. The controlled variables are the amount of water, amount of salt, and the size of the potato. If the potato is placed in a higher salt concentration, then the potato will decrease its size.

We started the lab by cutting the potato core length (44 mm). Each potato core are placed in test tubes. The test tubes have different salt concentration, test tube 1 has 0% salt concentration, test tube 2 has 0.625% salt concentration, test tube 3 has 1.25% salt concentration, test tube 4 has 2.5% salt concentration and test tube 5 has 5% salt concentration. The next day, we remove the potato core from the test tubes and measure their size. In test tube 1 with a 0% salt concentration, the potato core length after is 44 mm, the change in potato core length is 4 mm so the potato is hypertonic to that solution. In test tube 2 with a 0.625% salt concentration, the potato core length after is 42 mm, the change in potato length is 2 mm so the potato is hypertonic to that solution. In test tube 3 with a 1.25% salt concentration, the potato core length after is 39 mm, the change in potato length is -1 mm so the potato is
The onion cell’s color is fading because onion cell is hypertonic to the 15% salt water. When the distilled water is added to the onion cell, the color of the cell became more purple. The color of the onion cell became more purple because the onion cell is hypotonic to the distilled