"The addition of solutes to solvents can lower the freezing point, elevate the boiling point and lower the vapour pressure of the solvents." What do you mean by this sentence?

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Solution

In a solution, the solute particles at the surface reduce the amount of solvent particles that can enter vapour phase. This results in a lower vapour pressure. Consequently, the boiling point is elevated and freezing point is lowered.

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