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Osmosis in Plant Cells
Member rating: No Rating | Words: | Submitted: Thu Jul 11 2002
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Key Stage 4 - Assessment Bi1 - Osmosis in Plant Cells i) Investigation into Length-Changes when Varying Concentration of Water My AIM, in this experiment, is to find the correct concentration (conc.) of water at which uncooked potato chips remain unchanged in size, i.e. the perfect isotonic solution (soln.), having the same water concentration, and therefore same water potential, with a theoretically `flat` concentration gradient. The THEORY behind this is, that to find the isotonic soln., we must achieve results telling us that the mass, length, or other dimensions have remained constant throughout the duration of immersion in that certain soln. of conc. xM (moles per cubic decimetre or litre), which I predict to be between 0.2 and 0.4M. I have chosen this range as my hypothesis for the final result, because of a preliminary experiment carried out six months ago using beetroot slices, instead of potato chips. Here,...
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