Question

At 300 K molar conductivity of solution A is 350 units. and at infinite dilution the molar conductivity of the same sample is 480 unit. Predict the percentage dissociation of the electrolyte.

• A. 73.0 %
• B. 37.0 %
• C. 63.0 %
• D. 137.0 %

Answer 1

The correct option is A 73.0 %

Given, ${\Lambda }_m^0=480$
${\Lambda }_m=350$
$\alpha =\frac{\text{molar conductivity of solution at given concentration}}{\text{molar conductivity of solution at infinte dilution}}\alpha =\frac{{\Lambda }_m}{{\Lambda }_m^0}=\frac{350}{480}$
$=0.73$ or $73$%