Question

During the charging of a lead-acid storage battery, the cathode reaction is

• A. formation of $ \text{PbS}{{\text{O}}_{4}} $
• B. reduction of $ \text{P}{{\text{b}}^{\text{2+}}} $ to Pb
• C. formation of $ \text{Pb}{{\text{O}}_{\text{2}}} $
• D. oxidation of Pb to $ \text{P}{{\text{b}}^{\text{2+}}} $

Answer 1

Answer: (C)

During the charging of a lead acid storage battery, electrode reactions are as follows : Cathode anode: $ P{{b}^{2}}+2{{e}^{-}}\xrightarrow{{}}Pb $ At cathode: $ PbS{{O}_{4}}+2{{H}_{2}}O\xrightarrow{{}}Pb{{O}_{2}}\xrightarrow{{}}SO_{4}^{2-}+2{{e}^{-}} $ or $ P{{b}^{2+}}\xrightarrow{{}}P{{b}^{4+}}+2{{e}^{-}} $