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Solutions
Question
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Why does the boiling point of a solvent increase by the presence of a solute in it?

Answer

Answer:

A liquid boils when its vapour pressure is equal to the atmospheric pressure. When a nonvolatile solute is added to a solvent, its vapour pressure gets lowered. Therefore, higher temperature will be required to attain the same vapour pressure. Therefore, the solution of a nonvolatile solute will boil at higher temperature than the solvent.

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