The shorthand equation shows us in a glance what happens in the electrochemical reaction. For a lead storage battery, we have; PbSO4(s)/H2O//Pb (s) ,PbO2(s) /H2SO4
What is an electrochemical reaction?
An electrochemical reaction is one in which electrical energy is produced from a chemical reaction. The equations in a lead storage battery are;
Anode: Pb (s) + HSO4- → PbSO4(s) + H+ + 2 e-
Cathode: PbO2(s) + HSO4- + 3 H+ + 2 e- → PbSO4(s) + 2 H2O
Overall: Pb (s) + PbO2(s) + 2 HSO4- + 2 H+ → 2 PbSO4(s) + 2 H2O
Hence, the shorthand notation of this reaction is;
PbSO4(s)/H2O//Pb (s) ,PbO2(s) /H2SO4
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