State Rioult's Ltw. How is It formul.ited for solutions of non-volatile solutes ?
Derive expression for Rioult's law when the solute is non-volatile.

Explanation

Rioult., law tor solution of non-voliilile solution: The relative lowering of vapour pressure for a solution Is equal to the mole fraction of solute when solvent alone is volatile.
`(P_(A)^(0) - P_(A))/(P_(A)^(0)) = X_(B)`
where , `P_(A)^(0) rarr ` vapour pressure of pure component . A. .
`P_(A) rarr` Vapour pressure of component .A.
`X_(B) rarr ` mole fraction of solute
`P_(A)^(0) - P_(A) rarr ` Lowering of vapour pressure
`(P_(A)^(0) - P_(A))/(P_(A)) rarr` Relative lowering of vapour pressure.