Will Fe^2+/Fe or Fe^3+/Fe give the larger E°cell value when combined with Ni^2+/
ID: 526986 • Letter: W
Question
Will Fe^2+/Fe or Fe^3+/Fe give the larger E°cell value when combined with Ni^2+/Ni half-cell? Is the Ni metal acting as the anode or the cathode in your combination?
Explanation / Answer
A:- Thestandard reduction potential of Fe^2+ + 2e -----> Fe , E^o = -0.41 V
Thestandard reduction potential of Ni^2+ + 2e -----> Ni , E^o = -0.23 V
The standard reduction potential of Ni is higher, so which acts as cthode (reduction reaction is takes place ), lwer reduction potential of Fe acts as anode ( oxidation reaction is takes place )
A:- Ni acts as cathode.
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