Question

(1) Write the reaction of oxidation of iron at anode?
(2) Write the reaction of oxidation of iron at cathode
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Answer 1

Answer:

1. In the corrosion process, iron metal acts as the anode in a galvanic cell and is oxidized to Fe2+; oxygen is reduced to water at the cathode. The relevant reactions are as follows: ... overall: 2Fe(s)+O2(g)+4H+(aq)→2Fe2+(aq)+2H2O(l) E°=1.68V.

Answer 2

1. In the corrosion process, iron metal acts as the anode in a galvanic cell and is oxidized to Fe2+; oxygen is reduced to water at the cathode. ... at anode: Fe(s)→Fe2+(aq)+2e− E°=−0.45V. overall: 2Fe(s)+O2(g)+4H+(aq)→2Fe2+(aq)+2H2O(l) E°=1.68V.

2. In the corrosion process, iron metal acts as the anode in a galvanic cell and is oxidized to Fe2+; oxygen is reduced to water at the cathode. The relevant reactions are as follows: at cathode: O2(g)+4H+(aq)+4e−→2H2O(l)E°=1.23V. at anode: Fe(s)→Fe2+(aq)+2e− E°=−0.45V.

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