How many of the following compounds are sparingly soluble in water?
$\begin{array}{l}BaS{O}_4,CaO,MgC{O}_3,Mg{\left(OH\right)}_2,Sr{H}_2,\\ BeC{l}_2,Mg{\left(Cl{O}_4\right)}_2,Ca{F}_2,BaC{l}_2,Ca{\left(N{O}_3\right)}_2\end{array}$

$BaS{O}_4,MgC{O}_3,Mg{\left(OH\right)}_2\text{ and }Ca{F}_2$ are sparingly soluble  $BeC{l}_2,Mg\left(Cl{O}_4\right),BaC{l}_2\text{ and }Ca{\left(N{O}_3\right)}_2$
dissolve in water without reaction. $CaO,Sr{H}_2$  dissolve in water by reacting with water.