Question

If the conductivity of $0.02M$ solution of KCL at $298K$ is $0.0248Sc{m}^{-1}$.Calculate its molar conductivity.

• A. $112Sc{m}^{2}mo{l}^{-1}$
• B. $124Sc{m}^{2}mo{l}^{-1}$
• C. $136Sc{m}^{2}mo{l}^{-1}$
• D. $148Sc{m}^{2}mo{l}^{-1}$

Answer 1

The correct option is B

$124Sc{m}^{2}mo{l}^{-1}$

Molar conductivity -

Given: conductivity$k=0.0248Sc{m}^{-1}$, molarity$C=0.02M$, temperature $T=298K$

The formula of moral conductivity ${\wedge }_m=\frac{100\times k}{C}$

$$\begin{gathered} {\wedge }_m=\frac{100\times 0.0248Sc{m}^{-1}}{0.02M} \\ {\wedge }_m=124Sc{m}^{2}mo{l}^{-1} \end{gathered}$$

Hence, option (b) is correct.