A solution of urea in water has boiling point of `100.15^(@)C`. Calculate the freezing point of the same solution if `K_(f)` and `K_(b)` for water are `1.87 K kg mol^(-1)` and `0.52 K kg mol^(-1)`, respectively.

Explanation

`"We know that, "DeltaT_b="Molarity"xxK_b`
`"Molarity"=(DeltaT_b)/K_b=0.15/0.52=0.2884`
`DeltaT_f="molarity"xxK_f`
`=0.2884xx1.87==0.54^@C`
Thus, the freezing point of the solution
`=-0.54^@C`