After adding non-volatile solute freezing point of water decreases to ( -0.186^ C . ) Calculate ( T_ b ) if ( K_ f =1.86 K ~kg ~mol ⁻¹ ) and ( K_ b =0.521 K ~kg ~mol ⁻¹ )

Step-by-step solution

Depression of freezing point for the water is, [ array l T_ f =T_ f ^ -T_ f =0-(-0.186)=0.186^ C T_ f =K_ f m array ] Now, the molality of the solution, [ m= T_ f K_ f = 0.186 1.86 =0.1 ~m ] Elevation of boiling point for water is, [ array l T_ b =K_ b m =0.521 0.1 T_ b =0.0521 K array ]