What is the concentration of an electrolyte solution to have molar conductivity of $101 \Omega^{-1}…

What is the concentration of an electrolyte solution to have molar conductivity of $101 \Omega^{-1} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$ and conductivity of $1.01 \times 10^{-2} \Omega^{-1} \mathrm{~cm}^{-1}$ at 298 K ?
  1. 0.05 M
  2. 0.1 M
  3. 0.15 M
  4. 0.2 M

Solution

$\begin{array}{ll} & \text { Molar conductivity }(\wedge)=\frac{1000 \mathrm{k}}{\mathrm{c}} \\ & 101 \Omega^{-1} \mathrm{~cm}^2 \mathrm{~mol}^{-1}=\frac{1000 \times 1.01 \Omega^{-1} \mathrm{~cm}^{-1} \times 10^{-2}}{\mathrm{c}} \\ \therefore \quad & \mathrm{c}=\frac{1000 \times 1.01 \times 10^{-2}}{101}=0.1 \mathrm{M}\end{array}$

Asked in: MHT CET 2024 (11 May Shift 2)

Practice more Electrochemistry questions on Aicharya