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Question : 16
Total: 27
(a) Write the steps involved in the extraction of pure metals in middle of the activity series from carbonate ores.
(b) How is copper extracted from its sulphide ore? Explain the various steps supported by chemical equations. Draw labelled diagram for electrolytic refining of copper.
(b) How is copper extracted from its sulphide ore? Explain the various steps supported by chemical equations. Draw labelled diagram for electrolytic refining of copper.
Solution:
First the carbonate ore of a metal is heated in absence of air. This process is called calcination.
+
Then,mathrm Z n O
ZnO +
→
+
(b) Copper is extracted from sulphide ore by the process of roasting. It is done in presence of air:
2 Cu 2 S + 3 O 2
Cu 2 O + 2 SO 2
2 Cu 2 O + Cu 2 S
6 Cu + 2 SO 2
Electrolytic refining of copper:
Then,
(b) Copper is extracted from sulphide ore by the process of roasting. It is done in presence of air:
Electrolytic refining of copper:
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