How copper is extracted from its sulphide ore by oxidising cuso4
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Cu2S+ o2 -----> Cu2O + SO2
Copper is first roasted in excess of air and then copper oxide is obtained.
After when a considerable amount of copper oxide is extracted then the supply of air is stopped an copper oxide is heated with the remaining copper sulphide.
CuO+ Cu2S---> Cu+ SO2
(You can now balance the equations)
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