Question

Explain the step for extraction of copper from its sulphide ore. Write the balanced equation involved in this process

Answer 1

Roasting of sulphide ore:

2Cu2S(s)+3O2(s) →2Cu2O(s)+2SO2(g)

(b) Reduction of copper (I) oxide with copper (I) sulphide:

2Cu2O+Cu2S→6Cu(s)+SO2(g)

This reaction is known as auto -reduction.

(c)Reaction for electrolytic refining:

At anode : Cu2+(aq)+2e-→Cu(s)

At cathode : Cu(s) →Cu2+(aq)+2e-

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Answer 2

Answer:

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