Question

The specific conductance of 0.05 M NaOH solution is 0.0115 S cm$^{-1}$. What is its molar conductance ($\Lambda_m$) in S cm$^2$ mol$^{-1}$?

• A. 23
• B. $5.75 \times 10^{-7}$
• C. 2300
• D. 230

Hint:

Molar conductance is calculated as $\Lambda_m = \kappa \times \dfrac{1000}{C}$

Answer 1

The Correct Option is D

$\Lambda_m = \dfrac{\kappa \times 1000}{C}$
$= \dfrac{0.0115 \times 1000}{0.05} = \dfrac{11.5}{0.05} = 230$ S cm$^2$ mol$^{-1}$