Data on the solubility of salts is given. Which two compounds would form a precipitate when their aqueous solutions are mixed?
- A$\text{Ba(NO}_3)_2$ and $\text{CaCl}_2$
- B$\text{CuSO}_4$ and $\text{Zn(NO}_3)_2$
- C$\text{KCl}$ and $\text{Na}_2\text{SO}_4$
- D$\text{Pb(NO}_3)_2$ and $\text{MgSO}_4$