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+1 vote
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in Chemistry by (61.9k points)

Following reactions occur at cathode during the electrolysis of aqueous silver chloride solution : 

Ag+(aq) + e-   Ag(s)

E° = +0.80 V

H+(aq) + e- → 1/2 H2(g)

E° = 0.00 V

On the basis of their standard reduction electrode potential (E°) values, which reaction is feasible at the cathode and why ?

1 Answer

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Best answer

Ag+(aq) + e- →  Ag(s) ; E° = +0.80 V

H+(aq) + e- → 1/2 H2(g) ; E° = 0.00 V

On the basis of their standard reduction potential (E°) values, cathode reaction is given by the one with higher E° values.

Thus Ag+(aq) + e- →  Ag(s) reaction will be more feasible at cathode.

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