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What acid is in a car battery?

A car battery contains sulfuric acid (H2SO4). Sulfuric acid is a highly corrosive, colorless, odorless, and viscous liquid that is miscible with water in all proportions. It is one of the most important industrial chemicals, with a wide range of applications, including the production of fertilizers, chemicals, plastics, detergents, and pharmaceuticals. In a car battery, sulfuric acid acts as the electrolyte, which allows the chemical reaction between lead and lead dioxide to take place, generating electricity.