1. (30 points) Electrolysis is carried out on an aqueous solution containing 0.5
ID: 698923 • Letter: 1
Question
1. (30 points) Electrolysis is carried out on an aqueous solution containing 0.50M zinc sulfate and 0.50M nickel sulfate. Specify the nature of the products generated at the electrodes and write down the net cell reaction that occurs, explaining your reasoning. The relev reactions are listed below along with their standard reduction potentials ant half Ni2+(aq) + 2e- Zn2+(aq) + 2e- 2H20(I) + 2e- 02(g) + 4H+(aq) + 2e s,082-(aq) + 2e Ni(s) Zn(s) H2(g) +2OH-(aq) E0.25V e" =-076V EO=-O.83V Eo= 1.23V Eo= 2.05V -2H2O(1) 25042-(aq)Explanation / Answer
more negative reduction potential ion undergoes oxidation . So Zn undergoes oxidation and Ni under goes reduction.
Zn(s) -----------------> Zn^2+ (aq) + 2e^- E0 = 0.76v
Ni^2+ (aq) + 2e^- -------> Ni(s) E0 = -0.25v
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Zn(s) + Ni^2+ (aq) ----------> Zn^2+ (aq) + Ni(s) E0cell = 0.51v overall net reaction
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