Based on the standard reduction potentials given below, which species is most likely to be oxidized?

Question

Ag+ + e- → Ag, Eo= 0.80 V
Cu2+ + 2e- → Cu, Eo= 0.34 V
Zn2+ + 2e- → Zn, Eo= -0.76 V
Cd2+ + 2e- → Cd, Eo= -0.40 V

I thought the answer would be Zn2+ that'd be most likely to be oxidized because it has the lowest Standard reduction potential, but it was wrong and I'm not sure why.

Answer 1

Not Zn^2+. It's Zn and for the reason you cite. Zn ==> Zn^2+ + 2e has the highest oxidation potential