Question

The resistance and conductivity of 0.02 M KCl solution are 82.4 ohm and $0.002768Sc{m}^{-1}$, respectively. When filled with $0.005N{K}_{2}S{O}_4$, the solution had a resistance of 324 ohm. Cell constant is

• A. $0.228c{m}^{-1}$
• B. $0.728c{m}^{-1}$
• C. $0.528c{m}^{-1}$
• D. $0.428c{m}^{-1}$

Answer 1

The correct option is A $0.228c{m}^{-1}$

$k=\frac{1}{R}\times \frac{1}{a}$
$\therefore \frac{1}{a}\left(constant\right)=k\times R=0.002768\times 82.4=0.2281c{m}^{-1}$