electrochemistry

Question: On the basis of the electrochemical theory of aqueous corrosion, the reaction occuring at the cathode is

1) ${{O}_{2(g)}}+4{{H}^{+}}_{(aq)}+4{{e}^{-}}\to 2{{H}_{2}}{{O}_{(l)}}$

2) $F{{e}_{(s)}}\to Fe_{(aq)}^{2+}+2{{e}^{-}}$

3) $Fe_{(aq)}^{2+}\to Fe_{(aq)}^{3+}+{{e}^{-}}$

4) ${{H}_{2(g)}}+2OH_{(aq)}^{-}\to 2{{H}_{2}}{{O}_{(l)}}+2{{e}^{-}}$

Solution:

Explanation: No Explanation

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