Q. An aqueous solution of urea boils at at . Find the freezing temperature of soultion.
Given: and for water are and , respectively.

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Solution:

...... (3)
Depression in freezing point
Elevation in boiling point
Boiling point of water ;

Boiling point of urea in water

Freezing point of water
Freezing point of urea in water

from equation (3),

Freezing point urea in water

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Q. An aqueous solution of urea boils at at . Find the freezing temperature of soultion. Given: and for water are and , respectively.

...... (3) Depression in freezing point Elevation in boiling point Boiling point of water ; Boiling point of urea in water Freezing point of water Freezing point of urea in water from equation (3), Freezing point urea in water