Question

ou want to set up a series of voltaic cells with specific cell potentials. A Co2+(aq,...

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.

Co/Co2+ = -0.28 V

Al/Al3+ = -1.66 V

Cu/Cu2+ = +0.337 V

Sn/Sn2+ = -0.14 V

cadmium

aluminum

copper

tin

Homework Answers

Answer #1

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

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

----------------------------------------------------------------------------------------------------

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

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