Question

State the following:
Kohlrausch law of independent migration of ions 

Hint:

Kohlrausch's law helps in understanding the individual contributions of ions to the overall conductivity in solutions, especially at infinite dilution.

Answer 1

Kohlrausch's Law of Independent Ion Migration

Kohlrausch's law posits that the molar conductivity of an electrolyte at infinite dilution is the aggregate of the distinct contributions from its constituent cation and anion.

Consequently, each ion contributes to the overall conductivity autonomously, and the total is determined by the summation of the limiting molar conductivities of each individual ion.

Mathematical Representation:

\[ \Lambda_m^\infty = \lambda_+^\infty + \lambda_-^\infty \]

In this equation:

• \( \Lambda_m^\infty \) denotes the molar conductivity at infinite dilution.
• \( \lambda_+^\infty \) signifies the limiting molar conductivity of the cation.
• \( \lambda_-^\infty \) represents the limiting molar conductivity of the anion.

This principle is invaluable for ascertaining unknown molar conductivities and examining electrolyte characteristics in dilute solutions.