Question

How is copper obtained from its ore? Write equations.

Answer 1

Explanation:

• First the sulphide ore is heated in the presence of air to give Copper Oxide. ... The Copper Oxide is now heated to give impure Copper. 2CuO + 3O2 —> 6Cu + SO2. Finally, the impure Copper is refined by ELECTROLYSIS.

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Answer 2

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Copper is a metal that is present low in the reactivity series. It mainly occurs in nature in the form of sulphide ore which can be converted into the corresponding oxide simply by heating in the absence of air, a process known as roasting. The obtained oxide is then reduced with carbon or any other suitable reducing agent to obtain the metal. 

 2Cu2S + 3O2 → 2Cu2O + 2SO2

 2Cu2O + Cu2S → 6Cu + SO2

The obtained metal is then purified by electrolytic refining. 

Following reactions take place at anode and cathode

Anode : Cu ---------> Cu+2 + 2e-

cathode : Cu+2 + 2e- --------> Cu

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