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प्रश्न
- Given below are the steps for extraction of copper from its ore. Write the reaction involved.
- Roasting of copper (I) sulphide
- Reduction of copper (I) oxide with copper (I) sulphide.
- Electrolytic refining
- Draw a neat and well labelled diagram for electrolytic refining of copper
उत्तर
- `2"Cu"_2"S" + 3"O"_2 overset("Heat")(->)2"Cu"_2"O" + 2"SO"_2`
- `2"Cu"_2"O" + "Cu"_2"S" overset("Heat")(->) 6"Cu" + "SO"_2 `
- Electrode reactions :
Reaction at anode - `"Cu" -> "Cu"^(2+) + 2^("e"-)`
Reaction at cathode - `"Cu"^(2+) + 2"e"^- -> "Cu"`
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