CELL POTENTIAL, E

• Electrons are “driven” from anode to cathode by an electromotive force or emf.

• For Zn/Cu cell, this is indicated by a voltage of 1.10 V at 25°C and when [Zn2+] and [Cu2+] = 1.0 M.

Zn ? Zn2+ + 2e-

ANODE

2e- + Cu2+? Cu

CATHODE

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