In charging the lead accumulator battery

Options

A. `PbO_(2)` dissolves
B. `H_(2)SO_(4)` is reproduced
C. `PbSO_(4)` deposits on lead electrode
D. Pb deposits on lead eletrode

Explanation

To solve the question regarding the charging of a lead accumulator battery, we will break down the process step by step.

### Step-by-Step Solution:

1. **Understanding the Lead Accumulator Battery**:
- A lead accumulator battery, also known as a lead-acid battery, consists of lead (Pb) and lead dioxide (PbO2) as electrodes, and sulfuric acid (H2SO4) as the electrolyte.

2. **Charging Process**:
- During the charging process, electrical energy is supplied to the battery, which causes a chemical reaction to occur in the electrolyte and at the electrodes.

3. **Chemical Reactions**:
- The net reaction during the charging of the lead accumulator can be represented as:
\[ \text{PbSO}_4 + 2 \text{H}_2\text{O} \rightarrow \text{Pb (solid)} + \text{PbO}_2 + 4 \text{H}^+ + 2 \text{SO}_4^{2-} \]
- In this reaction, lead sulfate (PbSO4) is converted back into solid lead (Pb) and lead dioxide (PbO2), while sulfuric acid (H2SO4) is produced.

4. **Formation of Sulfuric Acid**:
- The reaction shows that for every mole of lead sulfate that is converted, two moles of water are used, and sulfuric acid is regenerated in the process. This indicates that the charging process restores the electrolyte's concentration.

5. **Conclusion**:
- Thus, during the charging of a lead accumulator battery, lead sulfate dissolves, and sulfuric acid is produced, which is essential for the battery's function.

### Final Answer:
- The net equation during charging indicates that sulfuric acid (H2SO4) is produced, confirming that the charging process regenerates the electrolyte.