Final answer:
The balanced chemical reaction associated with Fenton's reagent is Fe2+ + H2O2 → Fe3+ + OH− + OH•, generating hydroxyl radicals useful for degrading organic pollutants.
Step-by-step explanation:
The balanced chemical reaction associated with Fenton's reagent involves the reaction of ferrous ion (Fe2+) with hydrogen peroxide (H2O2). The correct balanced equation for this reaction is:
Fe2+ (aq) + H2O2 (aq) → Fe3+ (aq) + OH− (aq) + OH•
This reaction demonstrates the Fenton's reagent process, which generates hydroxyl radicals (OH•), potent oxidants that are useful in environmental chemistry for degrading organic pollutants. The other reactions listed (B, C, and D) are not correct representations of the Fenton's reaction.