4 Fe(OH)2 + 2 H2O + O2 → 4 Fe(OH)3

This is an oxidation-reduction (redox) reaction:

4 FeII - 4 e- → 4 FeIII (oxidation)

2 O0 + 4 e- → 2 O-II (reduction)

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

Reactants:

  • Fe(OH)2 – Iron(II) hydroxide source: wikipedia, accessed: 2019-09-27
    • Other names: Ferrous hydroxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Appearance: Green solid source: wikipedia, accessed: 2019-09-27
  • H2O – Water, oxidane source: wikipedia, accessed: 2019-09-27
    • Other names: Water (H2O) source: wikipedia, accessed: 2019-09-27, Hydrogen hydroxide (HH or HOH) source: wikipedia, accessed: 2019-09-27, Hydrogen oxide source: wikipedia, accessed: 2019-09-27
    • Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas source: wikipedia, accessed: 2019-09-27
  • 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

Products:

  • Fe(OH)3