In a lead-acid battery, the electrolyte's role is to what?

In a lead-acid battery, the electrolyte's role is to what?

• A. It enables ion conduction and energy storage
• B. It fuels chemical reactions with air
• C. It seals the plates
• D. It acts as a coolant

Answer: (A)

Ion movement through the electrolyte is what makes a lead-acid battery work. The electrolyte is a sulfuric acid solution that provides the ions needed for the chemical reactions at the plates. As the battery discharges, ions in the electrolyte participate in the redox reactions at the positive and negative plates, allowing charge to flow internally while electrons travel through the external circuit. This ionic conduction is also how the battery stores and releases energy—the movement of ions balances the flow of electrons, keeping the circuit closed. The electrolyte does not supply reactions with air, seal the plates, or act as a coolant; its main role is to enable ion conduction so the chemical reactions can occur and energy can be stored and delivered.

Ion movement through the electrolyte is what makes a lead-acid battery work. The electrolyte is a sulfuric acid solution that provides the ions needed for the chemical reactions at the plates. As the battery discharges, ions in the electrolyte participate in the redox reactions at the positive and negative plates, allowing charge to flow internally while electrons travel through the external circuit. This ionic conduction is also how the battery stores and releases energy—the movement of ions balances the flow of electrons, keeping the circuit closed. The electrolyte does not supply reactions with air, seal the plates, or act as a coolant; its main role is to enable ion conduction so the chemical reactions can occur and energy can be stored and delivered.