Chemistry - Ionic Equilibrium Question with Solution | TestHub

A mixture of$100\mathrm{ }\mathrm{m} \mathrm{mol}$of$\mathrm{Ca}{\left(\mathrm{OH}\right)}_2$and$2 \mathrm{g}$of sodium sulphate was dissolved in water and the volume was made up to$100\mathrm{ }\mathrm{mL}.$What is the mass of calcium sulphate formed and the concentration of${\mathrm{OH}}^{-}$in resulting solution, respectively? (Molar mass of$\mathrm{Ca}{\left(\mathrm{OH}\right)}_2,\mathrm{ }{\mathrm{Na}}_2{\mathrm{SO}}_4$and${\mathrm{CaSO}}_4$are$74, 143$and$136 \mathrm{g}{\mathrm{mol}}^{-1},$respectively;${\mathrm{K}}_{\mathrm{sp}}$of$\mathrm{Ca}{\left(\mathrm{OH}\right)}_2 \mathrm{is}5.5\times {10}^{-6}$)