Question

A lead–acid automotive battery consists of voltaic cells in series. The cathode of each cell consists of lead(IV) oxide (PbO₂) packed in a metal grid. The anode of each cell is composed of lead. Both electrodes are immersed in sulfuric acid. What is the composition of the cathode in each cell of a lead–acid automotive battery?

1) Lead(IV) oxide (PbO₂)
2) Lead
3) Sulfuric acid
4) Metal grid

Answer 1

The cathode of each cell in a lead-acid automotive battery is composed of lead(IV) oxide (PbO₂) and is part of a metal grid structure.

Step-by-step explanation:

The composition of the cathode in each cell of a lead-acid automotive battery is lead(IV) oxide (PbO₂), which is packed in a metal grid. During the operation of the battery, a series of electrochemical reactions occur at the cathode involving PbO₂ and the electrolyte, which is an aqueous solution of sulfuric acid (H₂SO₄). The battery typically consists of multiple such cells connected in series, with each cell contributing approximately 2 volts to the overall voltage, which for a standard car battery would amount to 12 volts with six cells in series.