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Explain and describe the mechanisms of Osmosis Osmosis is the diffusion of a solvent through a partially permeable membrane until there is an equal concentration on either side of the membrane. The partially permeable membrane contains pores that are very small. Because these pores are only very small, only certain molecules can pass through it. Usually though the membrane will allow all or none of the molecules through. When only one type of molecule is let through though, the membrane is said to be partially permeable. This is because it allows a selective flow. A classic example of this is Visking tubing. If a concentrated solution of sugar (glucose) is put in Visking tubing with no leaks, then when the tubing is lowered into distilled water, after a time the water molecules will have diffused into the Visking tubing until the concentration is equal. The Visking tubing is a partially permeable...

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