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Define the terms:(a) semi-permeable membrane(b) osmosis. |
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Answer» (a) Semi-permeable membrane: It is a membrane that allows the movement of solvent molecules (e.g. water molecules) through it but prevents the movement of solute particles (e.g. sugar or salt molecules). For example: Egg membrane, parchment membrane, cellophane paper etc. are semipermeable membranes. (b) Osmosis: The diffusion of water molecules through a semi-permeable membrane from a region where water is more concentrated to a region where it is less concentrated is called osmosis. In other words, osmosis is the diffusion of water from its pure state or dilute solution into a stronger or concentrated solution through a semi-permeable membrane. |
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