Subject: Physical Chemistry · Chapter: Electrochemistry · Topic: Electrochemistry – General · Exam: NET DEC 2017 · Marks: 2 · Difficulty: Medium
Conductivities of water and a saturated solution of a sparingly soluble salt $\mathrm{AB}_{2}$ are 7 and $21 \mu \mathrm{S} \mathrm{m}^{-1}$, respectively. Given $\lambda_{\mathrm{A}^{2+}}^{0}=12.72 \mathrm{mS} \mathrm{m}^{2} \mathrm{mol}^{-1}$ and $\lambda_{\mathrm{B}^{2-}}^{0}=7.64 \mathrm{mS} \mathrm{m}^{2} \mathrm{mol}^{-1}$, the solubility of $\mathrm{AB}_{2}$, in mol $\mathrm{m}^{-1}$, is