You continue exploring different combinations of electrodes in pursuit of better batteries. You know that the Ce⁴⁺/Ce³⁺ couple has been used in combination with Zn²⁺/Zn to develop new power sources with high potentials and a large storage capacity. Use the information in Appendix 2B to determine E8(Ce⁴⁺/Ce), for which the reduction half-reaction is

PLAN Use the alphabetical listing in Appendix 2B to find half-reactions that can be combined to give the desired halfreaction. Combine these half-reactions and their standard Gibbs free energies of reaction. Use Eq. 1 of Topic 6L (ΔG° = –nFE°) to obtain the standard potentials and then simplify the resulting expressions. Because the constant F is used in the second and third steps (as set out in the text), it cancels, and you do not need to insert its numerical value.

Transcribed Image Text:

Ce+ (aq) + 4e · Ce(s) (A)