Question

Explain how the measurement of depression of freezing point is useful in the determination of molecular mass of a solute.

Answer 1

depression of freezing=K_fm

m = (wt. of solute/molecular mass of solute)1000/wt. of solvent.

Molecular mass of solute =wt. of solute x 1000 x K_f /(wt. of solvent x depression of freezing)

By this formula we can find the value of molecular mass of a solute.