The electrolyte in a battery is a solution of water and ______.

The electrolyte in a battery is a solution of water and ______.

• A. Sulfuric acid
• B. Baking soda
• C. Viscous oil
• D. Hydrogen sulfide

Answer: (A)

In many batteries, especially lead-acid types, the liquid that carries the charge between the plates is water mixed with sulfuric acid. The sulfuric acid dissociates in water to form ions that move toward the electrodes, enabling the chemical reactions that produce current. This ion movement is essential for both discharging and recharging the battery, and the acid also participates directly in the plate reactions to form and dissolve compounds like lead sulfate as the battery operates. Baking soda wouldn’t provide the same strong ionic conduction and would alter the chemistry unfavorably. Viscous oil doesn’t ionize to carry charge, so it can’t support the necessary reactions. Hydrogen sulfide is a gas and not a stable, practical electrolyte component in a functioning battery.

In many batteries, especially lead-acid types, the liquid that carries the charge between the plates is water mixed with sulfuric acid. The sulfuric acid dissociates in water to form ions that move toward the electrodes, enabling the chemical reactions that produce current. This ion movement is essential for both discharging and recharging the battery, and the acid also participates directly in the plate reactions to form and dissolve compounds like lead sulfate as the battery operates.

Baking soda wouldn’t provide the same strong ionic conduction and would alter the chemistry unfavorably. Viscous oil doesn’t ionize to carry charge, so it can’t support the necessary reactions. Hydrogen sulfide is a gas and not a stable, practical electrolyte component in a functioning battery.