`PbS(s)+4H_(2)O_(2)(aq)toPbSO_(4)(s)+4H_(2)O(l)`
In the above reaction, `H_(2)O_(2)` acts as a/an_____agent.

Explanation

To determine the role of \( H_2O_2 \) in the reaction \( PbS(s) + 4H_2O_2(aq) \rightarrow PbSO_4(s) + 4H_2O(l) \), we need to analyze the changes in oxidation states of the elements involved in the reaction.

### Step-by-Step Solution:

1. **Identify the Reactants and Products**:
- The reactants are lead sulfide (\( PbS \)) and hydrogen peroxide (\( H_2O_2 \)).
- The products are lead sulfate (\( PbSO_4 \)) and water (\( H_2O \)).

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