This cell converts the chemical energy liberated during the
redox reaction
Zn(s) + Cu2+(aq) ® Zn2+(aq) + Cu(s)
(2 1)
to electrical energy and has an electrical
potential equal to 1 1 V when concentration
of Zn2+ and Cu2+ ions is unity (1 mol dm–3)* Such a device is called a galvanic or a
voltaic cell