explain the steps for extraction of copper from its sulfide ore . Write the balanced chemical equation involved in the process .2)what is meant refining of metals? Draw a diagram of electrolytic refining of copper & name the substances used as cathode , anode & the electrolytic
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Extraction of copper- Copper pyrite or glance (Cu2S) is an ore of copper.
Extraction of copper is as follows :-
1. Roasting -Heating a sulphide ore strongly in the presence of excess air is called roasting.
2Cu2S +3O2gives on heating 2Cu2O +SO2.
2.Reduction -Heating a carbonate ore strongly in the presence of limited air is called reduction.
2Cu2O +Cu2Sgives on heating 6Cu+SO2
REFINING OF METAlS- The metals produced by various reduction processes are not very pure. They contain impurities which must be removed to obtain pure metal. The most widely used method for refining impure metals is called electrolyte refining
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