Chemistry - Ionic Equilibrium Question with Solution | TestHub

An aqueous solution contains an unknown concentration of$\mathrm{B}{\mathrm{a}}^{2+}$. When 50 mL of a 1 M solution of$\mathrm{N}{\mathrm{a}}_2\mathrm{S}{\mathrm{O}}_4$is added$\mathrm{B}\mathrm{a}\mathrm{S}{\mathrm{O}}_4$just begins to precipitate. The final volume is 500 mL. The solubility product of$\mathrm{B}\mathrm{a}\mathrm{S}{\mathrm{O}}_4$is$1\times 10^{-10}$. What is the original concentration of$\mathrm{B}{\mathrm{a}}^{2+}$?