Question

Specific conductance of $0.1M$ sodium chloride is $1.06\times {10}^{-2}$ $oh{m}^{-1}$ $c{m}^{-1}$, its molar conductance in $oh{m}^{-1}$ $c{m}^2$ $mo{l}^{-1}$ is :

• A. $1.06\times {10}^2$
• B. $1.06\times {10}^3$
• C. $1.06\times {10}^4$
• D. $5.3\times {10}^2$

Answer 1

The correct option is A $1.06\times {10}^2$

The relationship between the molar conductivity and the specific conductance is ${\Lambda }_m=\frac{\kappa \times 1000}{M}$.
Substitute $\kappa =1.06\times {10}^{-2}{ohm}^{-1}{cm}^{-1}$ and $M=0.1M$ in the above equation.
${\Lambda }_m=\frac{1.06\times {10}^{-2}{ohm}^{-1}{cm}^{-1}\times 1000}{0.1}=1.06\times {10}^2$.