Question

The figure shows the behavior of Pt and Ag cathodes at which reduction of H3O to H2(g) occurs. Explain why the two curves are not superimposed.

Pt Ag 0.5㎂ -0.2-0.3-0.4-0.6-0.7-0.8-0.9 E(V vs. S.C.E.)

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Answer #1

Reduction takes place at Ag electrode, because it has more negative reduction potential value. We know that oxidation takes place at +ve E value but reduction takes place at -ve E value.

So, here Pt electrode act as anode and Ag electrode act as cathode. HenceH3O to H2 reduction takes place at Ag electrode.

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The figure shows the behavior of Pt and Ag cathodes at which reduction of H3O to H2(g) occurs. Explain why the two curves are not superimposed. Pt Ag 0.5㎂ -0.2-0.3-0.4-0.6-0.7-0.8-0.9 E(V vs. S.C.E....
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