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An investigation into the effect of increasing the concentration of salt solutions on potato cells.
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| Submitted: Thu Jul 11 2002
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Emma Highton Science Investigation: Biology Aim: An investigation into the effect of increasing the concentration of salt solutions on potato cells. Prediction: Osmosis is the movement of water molecules across a partially permeable membrane from a region of high water concentration to a region of low water concentration. This diagram illustrates a concentrated sugar solution by a membrane. The membrane has pores in it, which are very small. (An example of a membrane like this is visking tubing.) There are more water molecules on the left-hand side of the membrane than the right. Water molecules are very small. Each is made of two hydrogen atoms and one oxygen atom, where as sugar molecules are many times larger than this. In visking tubing the holes are big enough to let water molecules through, but not sugar molecules, as they are too big. This is a partially permeable membrane therefore because...
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