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Investigating the effect of salt solution on potato tissues
Hypothesis
Osmosis is defined as, the movement or diffusion of water molecules across a partially permeable membrane from a region of high water concentration to a region of low water concentration. ...
Osmosis will occur wherever there is a difference in water concentration on either side of a partially permeable membrane, we also know that when this happens the cells will either become turgid, or will lose their water and so become plasmolysed thus a change in the mass will occur. Taking this into account:
I will test the hypothesis that, potato tissues placed in a solution with a higher concentration of water than the concentration of the cytoplasm of the potato cells, we can expect the potato tissues to expand and gain in mass due to the extra water as the water diffuses via osmosis and the cells become turgid. If we placed potato tissues in a solution of water that was lower than the concentration of the cytoplasm of the potato cells, we can expect the tissues to decrease in mass due to the loss of water as the water diffuses via osmosis and the cells become plasmolysed. The greater the concentration of water in the external solution the greater the amount of water that enters the cell by osmosis. ... At this point there will be no change in the length, and mass of the potato, as the net movement of water will be zero, no osmosis has occurred.
Approximate Word count = 1142
Approximate Pages = 4.6
(250 words per page double spaced)
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