Difference between Osmotic Pressure and Osmotic Potential:
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1.
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Osmotic Pressure (OP)
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Osmotic Potential
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2.
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It is expressed in bars with a positive sign.
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It is expressed in bars with a negative sign. It is also known as solute potential.
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3.
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OP of pure solvent (or water) is zero. The value of OP increases with increase in concentration of solute particles.
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Osmotic potential of pure solvent (or water) is zero.
Higher negative value of osmotic potential means greater the concentration of solute particles.
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4.
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If two solutions having different osmotic concentrations are separated by a semipermeable membrane, the molecules move from the solution having less OP to the solution having more OP.
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If two solutions having different osmotic concentrations are separated by a semipermeable membrane, the molecules move from the solution having more osmotic potential to the solution having less osmotic potential.
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