Question

5.
Observe the following picture a
write down the chemical reaction
with explanation.
Water drop
Collected rust
Fe,0,H,O
Fe2+ (aq)
Anode
Cathode
Fe -> Fer + 2e
10. + 24,0 + 4e -> 40H
10, + 4H+ + 4E -> 24,0
Iron​

Answer 1

Answer:

Explanation:

(1) Fe is oxidised to Fe2++ in the anode region

Fe(s) gives Fe2+(aq) + 2 e-

(2) O2 is reduced to form water in in the cathode region.

O2(g) + 4H+(aq) +4e- gives 2H2O(l)

When Fe2+ ions migrate from the anode region they react with water and further get oxidised to form Fe3+ ions

A reddish coloured hydrated oxide is formed from Fe3+ ions.It is called rust. It collect on the surface.

2Fe3+( aq) + 4H2O(l) gives Fe2O3.H20(s)+ 6H(aq)

Iron starts rusting  and a reddish coloured layer is collected on it. That is nothing but hydrated ferric oxide This process  is corrosion of iron.

Answer 2

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