What is Rault's law? How ideal solution obey this law?


Raoult’s law states that the relative lowering of the vapour pressure of a solvent by dissolving a non-volatile electrolyte is equal to the mole fraction of the solute.

Raoult’s law equation is written mathematically as;

Psolution = ΧsolventP0solvent

Psolution = vapour pressure of the solution
Χsolvent  = mole fraction of the solvent
P0solvent = vapour pressure of the pure solvent

A solution that obeys Raoult’s law is known as the ideal solution. This law is established by French chemist François-Marie Raoult in 1887.

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