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:

(here the constant B is positive)

• A. ${\lambda }_C={\lambda }_{\infty }-\left(B\right)\sqrt{C}$
• B. ${\lambda }_C={\lambda }_{\infty }+\left(B\right)\sqrt{C}$
• C. ${\lambda }_C={\lambda }_{\infty }-\left(B\right)C$
• D. ${\lambda }_C={\lambda }_{\infty }+\left(B\right)C$

Answer 1

The correct option is A ${\lambda }_C={\lambda }_{\infty }-\left(B\right)\sqrt{C}$

The correct relationship between ${\lambda }_C$ and ${\lambda }_{\infty }$ is

${\lambda }_C={\lambda }_{\infty }-\left(B\right)\sqrt{C}$

where $B$ is the Kohlrausch's constant.

This is the Kohlrausch's equation for strong electrolytes.