Chemistry - Ionic Equilibrium Question with Solution | TestHub

Solid Ba ${\left({\mathrm{NO}}_3\right)}_2$ is gradually dissolved in a $1.0\times 10^{-4}\mathrm{M}{\mathrm{Na}}_2{\mathrm{CO}}_3$ solution. At what concentration of ${\mathrm{Ba}}^{2+}$ will a precipitate begin to form ? $({\mathrm{K}}_{\mathrm{sp}}$ for $\mathrm{Ba}{\mathrm{CO}}_3=5.1\times 10^{-9})$.