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

Answer 1

The correct option is C ${\lambda }_c={\lambda }_{\infty }-B\sqrt{C}$

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