Raoult’s Law for Volatile Solutes

Raoult’s law states that in a solution, the vapour pressure of a component at a given temperature is equal to the mole fraction of that component in the solution multiplied by the vapour pressure of that component in the pure state.

The total vapour pressure P of a solution containing two components A and B is

Raoult’s Law for Non-Volatile Solutes

Raoult’s law states that the relative lowering of vapour pres­sure of a solution containing a non­volatile solute is equal to the mole fraction of the solute in the solution.

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