*
*
*
The oxidation
of aluminum is more likely than the oxidation of zinc.
These potentials indicate the relative
thermodynamic
tendency for the indicated
half-reaction to occur.
Al <--> Al+3 + 3 e– E = -0.166
volts
Zn <--> Zn+2 + 2 e–
E = -0.763 volts
Cu <--> Cu+2 + 2 e–
E = +0.34
volts