Sample Problem

Given the following half-reactions and E°red values, determine which species would be oxidized and which would be reduced.

Ag+ + e- → Ag E°red = +0.80 V

Tl+ + e- → Tl E°red = -0.34 V


Ag+ would be reduced to Ag and Tl would be oxidized to Tl+, since Ag+ has the higher E°red.