Question

The equivalent conductance of NaCl, HCl, and CH3COONa at infinite dilution are 126.45, 426.16, and 91 ohm-1cm2eq-1 respectively at 25°C. The equivalent conductance of acetic acid(at infinite dilution) would be

• A. 461.61 ohm-1cm2eq-1
• B. 390.71 ohm-1cm2eq-1
• C. cannot be determined from the given data
• D. 208.71 ohm-1cm2eq-1

Answer 1

Answer: (B)

390.71 ohm-1cm2eq-1

Answer 2

The correct answer is option (B): 390.71 ohm-1cm2eq-1

CH3COONa+HCl⟶CH3COOH+NaCl

λ∞eq(CH3COOH)=λ∞eq(CH3COONa)+λ∞eq(HCl)−λ∞eq(NaCl)

λ∞eq(CH3COOH)​=91+425.16−126.8=390.71 ohm−1cm2eq-1

​= Equivalence conductivity at infinitie dilution.