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Investigating Water Potential of Plant Cells Aim: To devise an experiment which will determine the water potential of a sample of root potato cells. Background Information Osmosis is the movement of water molecules through (partially permeable) membranes of cells. The overall movement of the molecules will be from a region with high water potential to a region of low water potential. A solution can be given a value which gives a measure of the tendency of the water molecules to move from one region to another. The water potential value of a solution is given based on two variables; the concentration of water molecules within the solution, and the pressure applied to the solution. If the water potential of two regions, with a (partially permeable) membrane between them, is the same; then the overall movement of water molecules between them will be at equilibrium. The molecules will not move between the regions with the same...

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