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Describe the working of a lead storage battery

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Lead Storage Batteries: Six cells are connected in series each cell provided 2V so total volt provided by the battery is 12V. The anode, a series of lead grids packed with spongy lead and cathode, a series of grids packed with lead dioxide 38% by weight H2SO4 act as the electrolyte.

Cell reaction
At anode:
\mathrm{Pb}(\mathrm{s})+\mathrm{HSO}_{4}^{-}(\mathrm{aq}) \rightarrow \mathrm{PbSO}_{4}(\mathrm{s})+2 \mathrm{H}^{+}+2 \mathrm{e}^{-}
\mathrm{E}^{\circ}=0.296 \mathrm{V}

At cathode:
\mathrm{PbO}_{2}(\mathrm{g})+3 \mathrm{H}^{+}(\mathrm{aq})+\mathrm{HSO}_{4}^{-}(\mathrm{aq})+2 \mathrm{e}^{-} \rightarrow 2 \mathrm{PbSO}_{4}(\mathrm{s})+2 \mathrm{H}_{2} \mathrm{O}(\mathrm{l})
\mathrm{E}^{\circ}=1.628 \mathrm{V}

Net Reaction
\mathrm{Pb}(\mathrm{s})+\mathrm{PbO}_{2}(\mathrm{s})+2 \mathrm{H}^{+}+2 \mathrm{HSO}_{4}^{-}(\mathrm{aq}) \rightarrow 2 \mathrm{PbSO}_{4}(\mathrm{s})+2 \mathrm{H}_{2} \mathrm{O}(\mathrm{s})
\mathrm{E}^{\circ}=1.924 \mathrm{V}

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Safeer PP

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