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Homework answers / question archive / 2NO−3(aq)+8H+(aq)+3Cu(s)→2NO(g)+4H2O(l)+3Cu2+(aq) Part A Indicate the half-reaction occurring at Anode
2NO−3(aq)+8H+(aq)+3Cu(s)→2NO(g)+4H2O(l)+3Cu2+(aq)
Part A Indicate the half-reaction occurring at Anode. Express your answer as a chemical equation. Identify all of the phases in your answer.
Part B Indicate the half-reaction occurring at Cathode. Express your answer as a chemical equation. Identify all of the phases in your answer.
Oxidation occurs at anode
Cu is oxidised to Cu(II) ions.
The half reaction ocuring at anode is
Reduction occurs at cathode
Nitrate ion is reduced to nitric oxide.
The half reaction ocuring at cathode is
Note: 2 electrons are involved in the oxidation half reaction. In the overall reaction, the oxidation half reaction is multiplied by 3 to balance Cu atoms. Hence, in the reduction half reaction, total six electrons participate.
The reduction half reaction can also be written as
Here the coefficent of each spcies is divided by 2.
