Which acid is used in a car battery?

The correct answer is sulphuric acid.

Key Points

• Sulphuric acid (H₂SO₄) is the primary acid used in car batteries.
• The concentration of sulphuric acid in car batteries typically ranges from 30-50%.
• Sulphuric acid in car batteries functions as the electrolyte, facilitating the flow of electric current.
• It plays a crucial role in the electrochemical reactions that occur within lead-acid batteries.

Additional Information

• Lead-Acid Battery:
  • A lead-acid battery is a type of rechargeable battery first invented in 1859 by French physicist Gaston Planté.
  • It uses lead dioxide and sponge lead plates submerged in sulphuric acid to generate electrical energy.
• Electrolyte:
  • The electrolyte in a car battery is a mixture of sulphuric acid and water.
  • It facilitates the flow of ions between the positive and negative plates during the battery's discharge and recharge cycles.
• Battery Maintenance:
  • Regularly checking the electrolyte level and topping it up with distilled water is essential for battery maintenance.
  • Proper maintenance ensures the longevity and optimal performance of the battery.
• Safety Precautions:
  • Sulphuric acid is highly corrosive and can cause severe burns; hence, appropriate safety gear should be worn during handling.
  • Ensure proper ventilation when working with car batteries to avoid inhaling harmful fumes.