Question

The graph plotted for log$(i-1)$ vs. log $A_v$, where i is van't Hoff factor for uni-univalent electrolyte and $A_v$ is ite molar conductivity at concentration c does not show the following characteristics:

• A. straight line.
• B. slope equal to unity.
• C. intercept equal to $log{A}_{\infty }$.
• D. intercept equal to $-log{A}_{\infty }$.

Answer 1

Answer: (C)

intercept equal to $log{A}_{\infty }$.

The graph plotted for log $(i-1)$ vs. log $A_v$, where i is van't Hoff factor for univalent electrolyte and $A_v$ is its molar conductivity at concentration c does not show the following characteristics:

$HA\leftrightharpoons H^{+}+A^{-}$

$\because n=2$

$\therefore i=\frac{A_v}{A_{\infty }}+1$

$\therefore log(i-1)=log{A}_v-log{A}_{\infty }$

This is an equation of the straight line of the type $y=mx+c$

$\therefore slope=1$ and $intercept=-log{A}_{\infty }$