Why is vapour pressure of a solution of glucose in water lower than that of water?
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Addition of solute to a solvent decreass the vapour pressure of solvent. This is because some fraction of the surface area of liquid is occupied by the solute molecule because of which the number of solvent molecules going in vapour phase gets reduced
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The vapour pressure of an aqueous solution of glucose lower than that of water.
It is because in glucose solution, the surface of liquid consists of both solute and solvent molecules, therefore, the fraction of surface covered by the solvent molecules gets reduced.
Hence, escaping tendency of solvent molecules into vapours also gets reduced, thus, vapour pressure of glucose solution decreases.
It is because in glucose solution, the surface of liquid consists of both solute and solvent molecules, therefore, the fraction of surface covered by the solvent molecules gets reduced.
Hence, escaping tendency of solvent molecules into vapours also gets reduced, thus, vapour pressure of glucose solution decreases.
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