Consider these metal ion/metal standard reduction potentials:
Cd2+(aq)|Cd(s) Zn2+(aq)|Zn(s) Ni2+(aq)|Ni(s) Cu2+(aq)|Cu(s) Co2+(aq)|Co(s)
-0.40 V -0.76 V -0.25 V +0.34 V -0.28 V
Based on the data above, which species is the best oxidizing agent?
a. Cd2+(aq)
b. Zn2+(aq)
c. Co2+(aq)
d. Cu2+(aq)
e. Ni2+(aq)