The Effect of Salt Concentration on Osmosis in Potato Cells
We should first explain what Osmosis is. It’s a passage of water from a region of high water concentration through membrane to a region of low water. Semi membrane is a very thin layer of material, which allows some things to pass through them but prevent other things from passing through. The cells allow small molecules like Oxygen, water, Carbon Dioxide, Ammonia. But will not allow larger molecules like Sucrose, Starch, or protein, etc. High concentration of water is either a very dilute solution like Sucrose or pure water. We came up with objective of this laboratory to determine if the salt in the water has an effect on the potato cells. Demonstrate diffusion across a semi-permeable membrane and measure the effect of concentration in the process . Differentiate between hypotonic,isotonic and hypertonic environment. Hypotonic is a condition in which the environment has a higher solute concentration than inside animal or plant cell. Isotonic is equal concentration that has net flow of water a cross permeable membrane. We will compare salt water to fresh water so we can see if there is an effect caused by the salt in the water. The procedures we trimmed the potato slice so that they all have sides. We cut our potato to equal pieces. We wanted to make four slice of potato in same size. We also measured the size of potato so that we can determine each effect of water and salt.
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