5-5 Classify ionic compounds as soluble or insoluble in water

5-5-1. Which of the following is insoluble in water?
A. Na₂CO₃, B. MgSO₄, C. PbCl₂, D. CaS

5-5-2. Which of the following is insoluble in water?
A. CuCl₂, B. Hg₂Cl₂, C. HgBr₂, D. Ca(NO₃)₂

5-5-3. Which of the following is soluble in water?
A. MgCO₃, B MgF₂, C. Mg(OH)₂, D. MgSO₄

5-5-JJW. Which of the following salts is insoluble in water?
A. NaNO₃, B. Fe(OH)₃, C. AgClO₄, D. MgSO₄