4 Fe(CrO2)2 + 7 O2 + 8 K2CO3 2 Fe2O3 + 8 K2CrO4 + 8 CO2

This is an oxidation-reduction (redox) reaction:

4 FeII - 4 e- 4 FeIII (oxidation)

8 CrIII - 24 e- 8 CrVI (oxidation)

14 O0 + 28 e- 14 O-II (reduction)

Fe(CrO2)2 is a reducing agent, Fe(CrO2)2 is a reducing agent, O2 is an oxidizing agent.

Reactants:

  • Fe(CrO2)2
  • 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
  • K2CO3Potassium carbonate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Other names: Carbonate of potash source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Dipotassium carbonate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Sub-carbonate of potash source: wikipedia, accessed: 2019-09-27
    • Appearance: White, hygroscopic solid source: wikipedia, accessed: 2019-09-27; Colourless hygroscopic crystals or hygroscopic white powder source: ICSC, accessed: 2019-09-04

Products:

  • Fe2O3Iron(III) oxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-07
    • Other names: Ferric oxide source: wikipedia, accessed: 2019-09-27source: ICSC, accessed: 2019-09-04source: wikidata, accessed: 2019-09-07source: NIOSH NPG, accessed: 2019-09-02, Hematite source: wikipedia, accessed: 2019-09-27, Ferric iron source: wikipedia, accessed: 2019-09-27
    • Appearance: Red-brown solid source: wikipedia, accessed: 2019-09-27; Reddish brown-to-black crystals or powder source: ICSC, accessed: 2019-09-04; Reddish-brown solid. [Note: Exposure to fume may occur during the arc-welding of iron.] source: NIOSH NPG, accessed: 2019-09-02; A fine, red powder of ferric oxide. [Note: Usually used in cake form or impregnated in paper or cloth.] source: NIOSH NPG, accessed: 2019-09-02
  • K2CrO4Potassium chromate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04
    • Other names: Chromic acid source: wikipedia, accessed: 2019-09-27, (K2CrO4) source: wikipedia, accessed: 2019-09-27, Dipotassium salt source: wikipedia, accessed: 2019-09-27
    • Appearance: Yellow powder source: wikipedia, accessed: 2019-09-27; Yellow crystals source: ICSC, accessed: 2019-09-04
  • CO2
    • Names: Carbon dioxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, {{plainlist| source: wikipedia, accessed: 2019-09-27, CO2 source: wikidata, accessed: 2019-09-02
    • Appearance: Colorless gas source: wikipedia, accessed: 2019-09-27; Odourless colourless compressed liquefied gas source: ICSC, accessed: 2019-09-04; Colorless, odorless gas. [Note: Shipped as a liquefied compressed gas. Solid form is utilized as dry ice.] source: NIOSH NPG, accessed: 2019-09-02