Discussion Forum



1)

 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:

Option C

Explanation:

 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.