what do you mean by osmotic pressure ?explain
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Osmotic pressure is the minimum pressure which needs to be applied to a solution to prevent the inward flow of its pure solvent across a semipermeable membrane. It is also defined as the measure of the tendency of a solution to take in pure solvent by osmosis.
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Explanation:
Osmotic pressure: When pure liquid water is separated by a membrane, permeable to water but not solute, from a solution containing a non-volatile solute, water will pass from the pure water side until sufficient extra pressure (Π) is caused or applied to the solution side .Water moves from high to low water activity due to osmosis and, if allowed, would equalize the water activity on both sides of the membrane. The rate of this osmotically-linked flow has been shown to equals the rate if a similar but hydrostatic pressure (in the opposite direction) was imposed.
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