Hydrogen peroxide oxidises [Fe(CN)6]4– to [Fe(CN)6]3– in acidic medium but reduces [Fe(CN)6]3– to [Fe(CN)6]4– in alkaline medium. The other products formed are, respectively:

Engineering

Chemistry

Hydrogen Peroxide Properties and Preparation

Test of Cations and Anions

Question

Hydrogen peroxide oxidises [Fe(CN)₆]^4– to [Fe(CN)₆]^3– in acidic medium but reduces [Fe(CN)₆]^3– to [Fe(CN)₆]^4– in alkaline medium. The other products formed are, respectively:

H₂O and (H₂O + O₂)

(H₂O + O₂) and H₂O

(H₂O + O₂) and (H₂O + OH¯)

H₂O and (H₂O + OH¯)

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2[Fe(CN)₆]^4– + 2H⁺ + H₂O₂ → 2[Fe(CN)₆]^3– + 4H₂O

2[Fe(CN)₆]^3– + 1H₂O₂ + 2OH¯ → 2[Fe(CN)₆]^4– + O₂ + 2H₂O