Chemistry - Ionic Equilibrium Question with Solution | TestHub

${\mathrm{Al}}_2{\left({\mathrm{SO}}_4\right)}_3$ solution of 1 molal concentrations is present in 1 L solution of density $2.684\mathrm{g}/\mathrm{mL}$. How many moles of ${\mathrm{BaSO}}_4$ would be precipitated on adding excess of ${\mathrm{BaCl}}_2$ in it?

[Atomic wt. : Al = 27, S = 32, Ba = 137,Cl = 35.5]