lead storage battery

Question

In a lead storage battery during discharge, the electrolyte density:

RankGuru · Accepted Answer

A **Lead Storage Battery** acts as a galvanic cell during discharge.
- **Reaction**: $Pb(s) + PbO_2(s) + 2H_2SO_4(aq) 	o 2PbSO_4(s) + 2H_2O(l)$
- **Analysis**: Notice that **Sulfuric Acid ($H_2SO_4$)** is being consumed from the electrolyte while **Water** is being produced. 
- Because the dense acid is replaced by less dense water, the **density (specific gravity)** of the electrolyte solution **decreases**. This is why measuring the density of the acid is used to check the state of charge in these batteries.

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More lead storage battery Practice Questions

During discharge of a lead storage battery, both electrodes are converted to: