Difficult
The final step for the extraction of copper from copper pyrite in the Bessemer converter involves the reaction:
- A$4Cu_2O + FeS \to 8Cu + FeSO_4$
- B$Cu_2S + 2Cu_2O \to 6Cu + SO_2$
- C$2Cu_2O + FeS \to 4Cu + Fe + SO_2$
- D$Cu_2S + 2FeO \to 2Cu + 2Fe + SO_2$
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