Question

In a chemical compound calcium sulphate: 

(i) Identify the two ions. 

(ii) Write the chemical formula of compound formed when positive ion is replaced by sodium ion. 

(iii) Name the resulting compound.

Answer 1

(i) The two ions are Ca²⁺ (cation) and SO₄^2-(anion)

(ii) When positive ion is replaced by sodium ion: 

Chemical formula: Na₂SO₄ 

(iii) The name of the resulting compound (Na₂SO₄) is sodium sulphate.