Question

ou want to set up a series of voltaic cells with specific cell potentials. A Co²⁺(aq, 1.0 M)| Co(s) half-cell is in one compartment. Choose the half-cell that you could use so that the cell potential will be close to 0.14 V with the cobalt cell as the cathode.

E°_Co/Co²⁺ = -0.28 V

E°_Al/Al³⁺ = -1.66 V

E°_Cu/Cu²⁺ = +0.337 V

E°_Sn/Sn²⁺ = -0.14 V

cadmium

aluminum

copper

tin

Answer 1

Sn(s) ------------------> Sn^2+ (aq) + 2e^-                      E0 = 0.14v

Co^2+ (aq) + 2e^- -----------> Co(s)                                E0 = -0.28v

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Sn(s) + Co^2+ (aq) --------------> Sn^2+ (aq) + Co(s)        E0 cell = -0.14v

Tin >>>>answer