The depression of freezing point of a solution of 0.22 molal aqueous solution of a non-electrolyte is `0. 41^(@)` C. The molal depression constant of water is _____ K kg `mol^(-1)`

Answer

`1.86`

Explanation

`DeltaT_(f ) = 0.41 ""^(@) C ` or 0.41 K
`K_(f) = (DeltaT_(f))/(m) = (0.41)/(0.22) = 1.86` K kg `mol^(-1)`