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How is it possible that copper acts as an oxidizing agent in some reactions,reducing agent in the other and as a coupling agent in ullmanns process

How is it possible that copper acts as an oxidizing agent in some reactions,reducing agent in the other and as a coupling agent in ullmanns process


 

Grade:12

1 Answers

Suraj Prasad IIT Patna
askIITians Faculty 286 Points
9 years ago
Although oxidation reactions are commonly associated with the formation of oxides from oxygen molecules, these are only specific examples of a more general concept of reactions involving electron transfer.

Redox reactions, or oxidation-reduction reactions, have a number of similarities to acid–base reactions. Like acid–base reactions, redox reactions are a matched set, that is, there cannot be an oxidation reaction without a reduction reaction happening simultaneously. The oxidation alone and the reduction alone are each called a half-reaction, because two half-reactions always occur together to form a whole reaction. When writing half-reactions, the gained or lost electrons are typically included explicitly in order that the half-reaction be balanced with respect to electric charge.

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