Which of the following species/reagent can reduce Fe3+(aq.) into Fe2+(aq.) at normal conditions? (NH4)2S, HI, Sn2+(aq.), CN-(aq.), NaNO2, SO2, Na2S2O3, SCN-(aq. | Reaction Mechanism — Chem-Mantra | Chem-Mantra

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Which of the following species/reagent can reduce Fe3+(aq.) into Fe2+(aq.) at normal conditions? (NH4)2S, HI, Sn2+(aq.), CN-(aq.), NaNO2, SO2, Na2S2O3, SCN-(aq.), Acidified NaIO3

Answer: **5** / (NH4)2S + FE3+ -> FES↓ + S↓ + NH4+. HI + FE3+ -> FEI2 + I2. SN2+ + FE3+ -> FE2+ + SN4+. SO2 + FE3+ -> FE2+ + SO4^2-. S2O3^2- + FE3+ -> FE2+ + S4O6^2-.

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