Consider the following standard reduction potentials.
Reduction Half-Reaction
Eo (volts)
Cr3+(aq) + 3e-
--> Cr(s)
-0.74
Cd2+(aq) + 2e-
--> Cd(s)
-0.40
Ni2+(aq) + 2e-
--> Ni(s)
-0.23
The Cr/Cr3+ half-reaction can be paired with the other two to produce voltaic cells because ________