It is more convenient to obtain the molecular weight of an unknown solute by measuring the freezing point depression than by measuring the boiling point elevation because

The freezing point of solution is ……..than the boiling point of pure solvent.

The freezing point of solution is ……..than the boiling point of pure solvent.

The freezing point of solution is ……..than the boiling point of pure solvent.

The Rast method, one of the older techniques for finding the molecular mass of an unknown, measures the freezing point depression of solution in camphor. Camphor is used because its freezing point is very sensitive to added solution solute (It has highest K_(f)) . A solution of 2.342 g of an unknown substancein 49.88 g of camphor freezes at 441.2 K . If K_(f) for camphor is 40.0 Kg mol^(-1) , calculate the molecular mass of the unknown. Strategy: Find the molality of the solution from the freezing point of the pure camphor, the freezing point of the solution and the value of K_(f) by using the relationship DeltaT_(f)=K_(f)m . From the molality, find the no. of moles of solute in given mass of solvent. Finally find the molar mass (Melting point of pure camphar is 453.0 K)

Will the molecular weight determined for an ionizing solute be greater or lesser than that calculated by elevation of boiling point method ?

Define boiling point. Write the formula to determine molar mass of a solute using freezing point depression method.

How will you calculate the molecular mass of a solute from depression in freezing point measurement?

The molecular weight of benzoic acid as determined by depression in freezing point method corresponds to :

What will be the molecular weight of NaCl determined experimentally following elevation in the boiling point or depression in freezing point method ?