The batteries in an automobile contain lead plates, water, PbSO₄ and H₂SO₄. The instructions with a battery charger state that when a car battery is being charged, there must be no flames or sparks. Hydrogen is liberated during the process and might explode on ignition. Therefore, the hydrogen released is an indication that a redox reaction occurs during the charging process.

Question

Quizplus · Accepted Answer

During the charging process of a lead-acid battery, a redox reaction occurs where lead and lead dioxide plates react with sulfuric acid, producing water and releasing hydrogen gas. This is a clear indication of a redox reaction, where oxidation and reduction processes take place, leading to the liberation of hydrogen gas.

The Batteries in an Automobile Contain Lead Plates, Water, PbSO4

The Batteries in an Automobile Contain Lead Plates, Water, PbSO₄