Expain the depression in freezing point of solution.

Explanation

* When a non-volatile solute is added to solvent vapour pressure of a solution decreases.
* This solution has lower freezing point than the freezing point of pure solvent.
* For a dilute solution depression of freezing point `(DeltaT_(f))` is directly proportion to molality (m) of the solution.
`DeltaT_(f)alpham" "DeltaT_(f)=K_(f)m`
`DeltaT_(f)` is depression in freezing point, i.e., `DeltaT_(f)=DeltaT_(f)^(0)-T_(f)`
`T_(f)` is freezing point of solution.
`T_(f)^(0)` is freezing point of solvent.