(a) Roasting of copper (1) sulphide

(b) Reduction of copper (1) oxide with copper (1) sulphide.

(c) Electrolytic refining

(ii) Draw a neat and well-labelled diagram for electrolytic refining of copper

Answers:

(i)

(a) Reaction Involved: 2Cu₂S+3O₂ →2Cu₂O+SO₂

(b) Reaction Involved: 2Cu₂O+ Cu₂S →6Cu+ SO₂

(c) Reaction Involved: Cu⁺²⁺ 2e^–→ Cu

(ii)