Electrochemical
cell
On the surface of a
gold cathode oxygen is reduced to water kaing up electrons:
O2
+ 4 H+ +
4
e-
=
2 H2O
The lead of the anode
is oxidized to lead oxid releasing electrons:
2
Pb + 2 H2O
=
2
PbO + 4 H+ +
4
e-
The total reaction
equation is:
O2
+ 2 Pb = 2
PbO
Using an acidic
electrolyte (acetic acid) the produced lead oxide is dissolved and hus
the anode is regenerated.
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