# Could a lead-acid battery electrolyte be replaced by hydrochloric or nitric acid?

Hydrochloric acid, as well as nitric acid, are also strong acids like sulfuric acid. So, why are not they used commercially in lead-acid batteries?

• HCl and HNO3 can't be used because they both would participate in redox reactions. – Ivan Neretin Dec 13 '16 at 19:52
• @DwiparnaDatta Well, there is a relationship between the cell voltage and the acid used, but for numerous reasons (like the redox participation mentioned by Ivan) the identity of the acid used has a huge effect on Pb-acid battery performance, far beyond just the achievable cell voltage. – hBy2Py Dec 13 '16 at 19:55

$$\ce{Pb(s) + HSO4−(aq) → \color{red}{PbSO4(s)} + H+ (aq) + 2e−}$$ $$\ce{\color{red}{PbO2(s)} + HSO4−(aq) + 3H+ (aq) + 2e− → \color{red}{PbSO4(s)} + 2H2O(l)}$$