Raoult's Law Definition: Raoult's Law is a law that relates the the vapor pressure of a solution is dependent on the mole fraction of a solute added to solution.
Raoult's Law is expressed by
Psolution = ΧsolventP0solvent
Psolution is the vapor pressure of the solution
Χsolvent is mole fraction of the solvent
P0solvent is the vapor pressure of the pure solvent
If more than one solute is added to the solution, each individual solvent's component is added to the total pressure.