Our question was how and why does a cell's internal environment change, as it's external environment changes? We two eggs in vinegar and let it sit for two days. We then washed off the vinegar and put it in water instead. Adding the vinegar go ride of the egg membrane which exposed the rest of the egg. We then put one egg in water and another egg in sugar water.
When we put the sugar concentration increased, the egg shrank. It shrank because there was a high concentration of sugar and a low concentration of sugar so the water in the egg diffused outside instead. For the one in water, in grew because there was more solute inside than outside so the solvent went inside the egg and the egg grew. This was a hypertonic diffusion.
A cell's internal environment changes as the external environment changes because of diffusion. There was a low concentration of sugar in the deonized water so there was actually more solute in the egg than in the solvent. The one with sugar water was hypertonic because there was a higher concentration of sugar in the solvent, causing the egg to shrink. So the water diffused from inside the egg to the outside. These were all examples of passive diffusion.
This lab demonstrates the biological principle of diffusion. It shows how diffusion works within cells.
Fresh vegetables are sprinkled with water at markets to keep them fresh. It is the make sure the vegetables don't lose too much water and dry up. Roads are salted to melt ice because it requires an even lower temperature to freeze ice so putting salt on the ice will help melt it. Too much salt can dehydrate plants. Salt absorbs moisture in water.
If you were to create a new experiment you would want to test how different concentrations effect cells.
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