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Determining the water potential of potato cortex cells An experiment to investigate the effect of different sucrose concentrations on potato tissues. Biological Background knowledge: Biological background knowledge on osmosis: Osmosis is a special form of diffusion, which involves the movement of solute molecules. Osmosis can be defined as the passage of water from a region where it is highly concentrated to a region where its concentration is lower, through a partially permeable membrane. Biological background knowledge on water potential: Water potential is a measure of the free kinetic energy of water in a system, or the measure of the tendency of water to leave a solution. The more concentrated the solution the more negative will be its water potential. Water diffuses from a region of higher to a region of lower water potential. The water potential of a system is the difference between the chemical potential of the water in the system and the chemical potential...

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