Short Answer TypePrepare CuSO4.5H2O starting from copper pyrites.
Pyrite is converted into cuprous sulphide and ferrous sulphide when reacts with oxygen.
2CuFeS2 + O2 → Cu2S + 2FeS + SO2
Cuprous sulphide and ferrous sulphide are partially oxidised.
2FeS + 3O2 → 2FeO + 2SO2
2Cu2S + 5O2 → 2CuSO4 + 2CuO
2FeO + O2 → Fe2O3
The roasted mass is extracted with water, CuSO4.5H2O obtains.
CuSO4 CuSO4.5H2O
A cell is represented by Zn|Zn2+ (aq) || Cu2+ (aq)| Cu. Given, Cu2+ + 2e- → Zn, E° = -0.763 V. Write the cell reactions, emf of the cell and state whether the cell reaction will be spontaneous or not?
Both phenol and alcohol contains -OH group. But still phenol is more acidic than alcohol. Explain why?
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