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

Let us consider the problem;

Using ${\lambda }_c={\lambda }_{\infty }-B\sqrt{C}$

This problem is based on Debye huckle equation,

${\lambda }_c={\lambda }_{\infty }-B\sqrt{C}$.