Question: What Is Battery Acid?
Battery acid could refer to any acid used in a chemical cell or battery, but usually this term s applied to describe the acid used in a lead-acid battery, such as is found in a motor vehicle.
Answer: Car or automotive battery acid is 30-50% sulfuric acid (H2SO4) in water. Usually the acid has a mole fraction of 29%-32% sulfuric acid, density of 1.25–1.28 kg/L and concentration of 4.2–5 mol/L. Battery acid has a pH of approximately 0.8.