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Waleed Mahmood Osmosis Investigation Aim: To investigate the effect of different sugar concentrations on potatoes. Osmosis is defined as the net movement of water molecules from a region in which they are highly concentrated to a region in which they are less concentrated. This movement must take place across a partially permeable membrane such as a cell wall, which lets smaller molecules such as water through but does not allow bigger molecules to pass through. The diffusion of water molecules will continue until it reaches equilibrium. This means that the molecules are randomly distributed throughout, leaving no area of lower or higher concentration. Plant cells always have a strong cell wall surrounding the cell membrane. When they take up water by osmosis they start to swell, but the cell wall prevents them from bursting. Plant cells become "turgid" when they are put in dilute solutions. Turgid means swollen and hard. The pressure...

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