H2O2 + 2 K3[Fe(CN)6] → O2 + K4[Fe(CN)6] + K2H2[Fe(CN)6]

This is an oxidation-reduction (redox) reaction:

2 O-I - 2 e- → 2 O0 (oxidation)

2 FeIII + 2 e- → 2 FeII (reduction)

H2O2 is a reducing agent, K3[Fe(CN)6] is an oxidizing agent.

Reactants:

  • H2O2 – Hydrogen peroxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: NIOSH NPG, accessed: 2019-09-02
    • Other names: Dioxidane source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Oxidanyl source: wikipedia, accessed: 2019-09-27, Perhydroxic acid source: wikipedia, accessed: 2019-09-27
    • Appearance: Very light blue color; colorless in solution source: wikipedia, accessed: 2019-09-27; Colourless liquid source: ICSC, accessed: 2019-09-04; Colorless liquid with a slightly sharp odor. [Note: The pure compound is a crystalline solid below 12°F. Often used in an aqueous solution.] source: NIOSH NPG, accessed: 2019-09-02
  • K3[Fe(CN)6] – Potassium hexacyanoferrate(III) source: wikipedia, accessed: 2019-09-27
    • Other names: Potassium ferricyanide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Red prussiate of Potash source: wikipedia, accessed: 2019-09-27, Prussian red source: wikipedia, accessed: 2019-09-27
    • Appearance: Deep red crystals, sometimes small pellets, orange to dark red powder source: wikipedia, accessed: 2019-09-27; Red crystalline powder source: ICSC, accessed: 2019-09-04

Products:

  • O2
    • Names: Dioxygen source: wikidata, accessed: 2019-09-07, Oxygen source: ICSC, accessed: 2019-09-04source: wikidata, accessed: 2019-09-07, Oxygen (liquefied) source: ICSC, accessed: 2019-09-04
    • Appearance: Odourless compressed gas source: ICSC, accessed: 2019-09-04; Liquefied gas. colourless-to-blue extremely cold liquid source: ICSC, accessed: 2019-09-04
  • K4[Fe(CN)6] – Potassium hexacyanidoferrate(II) source: wikipedia, accessed: 2019-09-27
    • Other names: Potassium ferrocyanide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, (Yellow) Prussiate of Potash source: wikipedia, accessed: 2019-09-27, Potassium hexacyanoferrate (II) trihydrate source: wikipedia, accessed: 2019-09-27
    • Appearance: Light yellow, crystalline granules source: wikipedia, accessed: 2019-09-27
  • K2H2[Fe(CN)6]