Question

The equivalent conductance of $NaCl$ at concentration $C$ and at infinite dilution are $\lambda_C$ and $\lambda_\infty$ respectively. The correct relationship between $\lambda_C$ and $\lambda_\infty$ is given as (where, the constant $B$ is positive)

• A. $\lambda_C = \lambda_\infty+(B)C$
• B. $\lambda_C = \lambda_\infty - (B)C$
• C. $\lambda_C = \lambda_\infty - (B)\sqrt C$
• D. $\lambda_C = \lambda_\infty +(B)\sqrt C$

Answer 1

Answer: (C)

$\lambda_C = \lambda_\infty - (B)\sqrt C$

Answer 2

According to Debye Huckle onsager equation,

$\lambda_{C}=\lambda_{\infty}-A \sqrt{C}$

Here $A = B$
$\therefore \, \lambda_{C}=\lambda_{\infty}-B \sqrt{C}$