What substance is reduced in a lead storage battery?

1 Answer
Andrea B.
Mar 1, 2018

PbO2

Explanation:

in a lead storage battery you have two reactions during the working:
#PbO_2 + H_2SO_4 + 2e+ 2H^+ = PbSO_4 +2 H_2O# that is the reaction of reduction because Pb goes from oxidation number +4 to +2 (Pb is reduced)
and
#Pb + H_2SO_4 = PbSO_4 + 2e+ 2H^+#
that is the reaction of oxidation because Pb goes from oxidation number 0 to +2
During the recharge you have the opposite reactions

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