Question

How is copper extracted from copper glance?

Answer 1

Question :-

How is copper extracted from copper glance ?

Answer :-

The chemical formula of copper glance is Cu₂S .

Extraction of copper from Copper glance is carried out using these steps :

Roasting of copper glance

Roasting of copper glance is done in the presence of excess air or oxygen.

Reaction :

$\mathsf{2Cu_2S+3O_2===>2Cu_2O+2SO_4}$

Reduction of copper oxide

Oxides are the easiest to reduce .

Copper sulphide acts as a reducing agent .

Reaction :

$\mathsf{2Cu_2O+Cu_2S====>6Cu+SO_2}$

Electrolytic refining .

Anode :

$\mathsf{Cu=====>Cu^{2+}+2e^{-}}$

Cathode :

$\mathsf{Cu^{2+}+2e^{-}======>Cu}$

Copper electrodes are used .