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How can I determine the overall electrochemical reaction that proceeds spontaneously?
Cd2+ | Cd, Co2+ | Co
1. Cd+Co2+ −¨Cd2++Co
2. Co+Cd2+ −¨Co2++Cd
(1. and 2. are answer choices)

  • Chemistry - ,

    Look up reduction potentials for
    Cd^2+ + 2e==> Cd and
    Co2^+ + 2e ==> Co.

    Look at which one of the two will give a positive voltage. That is the one that will proceed spontaneously.

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