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Investigating water movement in potatoes.
Member rating: No Rating | Words: | Submitted: Thu Jan 01 2004
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Investigating water movement in potatoes Aim The aim of this experiment is to find out of potatoes lose or gain weight in different strength solutions. Background Osmosis is the movement of water molecules through a particularly permeable membrane from a weak solution to a strong solution. We did some preliminary work, an experiment where we placed visking tubing with sugar solution into a beaker containing water. It was absorbed and the tubing blew up. This demonstrates osmosis when the visking tube contains water. We then put a piece of potato into each solution, we left it for 30 minutes and if it went hard we know it has been in a weak solution. A turgid cell is one that has gained water. A flaccid cell is one that has lost water. If a turgid cell is next to a flaccid cell then the flaccid will gain some of the turgid cells water. The potato that has...
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