Question

(i) Explain Kohlrausch's law. Write its applications.

Hint:

Kohlrausch's law helps determine ionic conductivities and solubilities of weak electrolytes.

Answer 1

Step 1: Kohlrausch's Law:
The molar conductivity of an electrolyte at infinite dilution is the sum of the conductivities of its individual ions. \[ \Lambda_m^\circ = \lambda^+ + \lambda^- \] 

Step 2: Applications: 1. Determination of Limiting Molar Conductivity of weak electrolytes.
2. Calculation of Degree of Dissociation (\(\alpha\)).
3. Determination of Solubility of Sparingly Soluble Salts.