Question

Another chemestry question
Given below are the steps for extraction of copper from its ore. Write the reaction involved.
A roasting of copper (1) sulphide
B reduction of copper(1) oxide with copper (1) sulphide
C electrolytic refining

Answer 1

Dear student ,

1.(a) Roasting of copper sulphide.
2Cu₂S (Copper sulphide) + 3O₂ $\to$2Cu₂O (Copper oxide) + 2SO₂

2. (b) Reduction of copper oxide with copper sulphide.
2Cu₂O + Cu₂S $\to$ 6Cu + SO₂

3. Electrolytic refining
At positive electrode, impure copper dissolves:
Cu (s) $\to$ Cu²⁺(aq) + 2e
At negative electrode, pure copper deposits:
Cu²⁺ + 2e $\to$ Cu (s)

Regards