Question

The limiting molar conductivities of a divalent cation (M²⁺) and a monovalent anion (A^–) are 57 S cm² mol^–1 and 73 S cm² mol^–1 respectively. Then find the limiting molar conductivity shown by their compound in S cm² mol^–1 is ______.

Answer 1

Correct answer: 203

Compound of M²⁺ and A^– is MA₂.

Limiting Molar conductivity of M²⁺ = 57 S cm² mol^–1

Limiting Molar conductivity of A^– = 73 S cm² mol^–1

Limiting Molar conductivity of MA₂ = 57 + 2 × 73

= 203 S cm² mol^-1