What is the primary reaction occurring in a lead-acid battery during discharge?
Correct Answer: Pb + PbO2 + 2H2SO4 → 2PbSO4 + 2H2O
- Step 1: Understand that a lead-acid battery has two main components: lead (Pb) and lead dioxide (PbO2).
- Step 2: Know that during discharge, the battery releases energy to power devices.
- Step 3: Recognize that sulfuric acid (H2SO4) is also involved in the reaction.
- Step 4: The reaction starts with lead (Pb) and lead dioxide (PbO2) combining with sulfuric acid (H2SO4).
- Step 5: This combination produces lead sulfate (PbSO4) and water (H2O).
- Step 6: The overall chemical reaction can be written as: Pb + PbO2 + 2H2SO4 → 2PbSO4 + 2H2O.
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