Consider the following reduction potentials...

Question

Consider the following reduction potentials:

Cd²⁺(aq) + 2e^– --> Cd(s); E° = –0.40 V

Pb²⁺(aq) + 2e^– --> Pb(s); E° = –0.13 V

Cu²⁺(aq) + 2e^– --> Cu(s); E° = 0.34 V

Br₂(l) + 2e^– --> 2Br^–(aq); E° = 1.07 V

Under standard-state conditions, which of the following reactions is spontaneous?

Answer 1

Br₂ ==> 2Br^- with any of the others will be spontaneous

Cu²⁺ ==> Cu with Pb or Cd will be spontaneous

Pb²⁺ ==> Pb with Cd will be spontaneous