CBSE Class 11-science Answered
Justify that the reaction 2Cu2O(s) + Cu2S(s) → 6Cu(s) + SO2(g) is a redox reaction.
Asked by Topperlearning User | 15 Apr, 2015, 01:33: PM
Expert Answer
Writing the oxidation number of each atom above its symbol, we have
+1 -2 +1 -2 0 +4 -2
2Cu2O(s) + Cu2S(s) → 6Cu(s) + SO2(g)
Here in the reaction, the oxidation number of copper decreases from +1 in Cu2O or Cu2S to 0 in copper metal, therefore copper is reduced. Further the oxidation number of S increases from -2 in Cu2S to +4 in SO2, therefore S is oxidised. Therefore, this reaction is a redox reaction.
Answered by | 15 Apr, 2015, 03:33: PM
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