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To investigate the changes of size which take place when pieces of potato are placed in solutions of varying osmotic concentration.
Member rating: No Rating | Words: | Submitted: Thu Jul 11 2002
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Aim: To investigate the changes of size which take place when pieces of potato are placed in solutions of varying osmotic concentration. Apparatus: Plastic straw, needle, cotton thread, scalpel, ruler, potato, 2 beakers, distilled water, salt solution, stand, clamp and boss. Hypothesis: I predict that the potato straw balance will tilt towards the piece of potato submerged in the beaker of distilled water, because the potato will gain mass. The piece of potato in the beaker of salt solution will lose mass. These effects are the results of osmosis. Osmosis is the movement of water molecules from a region of high concentration (of water) to a low concentration (of water) through a partially/selective permeable membrane. The diffusion theory of osmosis: When potato is placed in the beaker of distilled water, water diffuses into the potato by osmosis (because the concentration of water in distilled water is higher than the concentration of water inside the...
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