Question

Write the reaction taking place on Anode and Cathode region during rusting​

Answer 1

Answer:

oxidation in anode and reduction in cathode

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Answer 2

Answer:

At anode, Fe is oxidised to Fe(II) ions and at cathode oxygen is reduced to water. The overall reaction is

2Fe(s)+O

2

(g)+4H

+

(aq)→2Fe

2+

(aq)+2H

2

O(l)

Fe(II) ions are further oxidised to Fe(III) ions.

4Fe

2+

(aq)+O

2

(g)+4H

+

(aq)→4Fe

3+

(aq)+2H

2

O(l)

Fe(III) ions form an insoluble hydrated oxide which is deposited as red brown material called rust.

2Fe

3+

(aq)+4H

2

O(l)→Fe

2

O

3

H

2

O(s)+6H

+

(aq)

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