Electrochemistry Result Question 13
13. 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)
(2014 Main)
(a) $\lambda_C=\lambda_{\infty}+(B) C$
(b) $\lambda_C=\lambda_{\infty}-(B) C$
(c) $\lambda_C=\lambda_{\infty}-(B) \sqrt{C}$
(d) $\lambda_C=\lambda_{\infty}+(B) \sqrt{C}$
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Answer:
Correct Answer: 13. ( c )
Solution:
- According to Debye Huckel Onsager equation,
$ \lambda_C=\lambda_{\infty}-B \sqrt{C} $
where, $\lambda_C=$ limiting equivalent conductivity at concentration $C$
$\lambda_{\infty}=$ limiting equivalent conductivity at infinite dilution
$C=$ concentration
BETA
