Question

The value of molal depression constant or cryoscopic constant (K_f) depends on which of the following?

विकल्प

• Nature of solvent

• Heat of the solution of the solute in the solvent

• Nature of solute

• Vapour pressure of the solution

Answer 1

Nature of solvent

Explanation:

The molal depression constant (also called the cryoscopic constant, K_f) is defined as

`K_f = (RT_f^2M)/(Delta H_f)`

Where:

R = Gas constant

T_f = Freezing point of the solvent

M = Molar mass of the solvent

ΔH_f = Enthalpy of fusion of the solvent