Question

The equivalent conductances 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. ${\lambda }_c={\lambda }_{\infty }-b\sqrt{c}$
• B. ${\lambda }_c={\lambda }_{\infty }+b\sqrt{c}$
• C. ${\lambda }_c={\lambda }_{\infty }+bc$
• D. ${\lambda }_c={\lambda }_{\infty }-bc$

Answer 1

The correct option is A ${\lambda }_c={\lambda }_{\infty }-b\sqrt{c}$

According to debye huckel onsager equation we have,

equivalent conductance of NaCl is given by

${\lambda }_C$ = ${\lambda }_{\infty }$ - $b{C}^{1/2}$

where b is positive.