Question

Some positive ions and negative ions are given in the table. Write the name and chemical formulae of the maximum possible salts formed by them.

Positive ion	Negative ion
Ca2+ (calcium ion)	Cl- (chloride ion)
NH+4 (Ammonium ion)	SO2-4 – (sulphate ion)
PO43- – (Phosphate ion)

Answer 1

1) Calcium chloride CaCl₂

2) Calcium sulphate CaSO₄ 

3) Calcium phosphate Ca₃(PO₄)₂

4) Ammonium chloride NH₄Cl 

5) Ammonium sulphate (NH₄)₂SO₄ 

6) Ammonium phosphate (NH₄)₃PO₄