4 H₂O + 3 Fe → 4 H₂ + Fe₃O₄

This is an oxidation-reduction (redox) reaction:

H₂O is an oxidizing agent, Fe is a reducing agent.

Reactants:

• H₂O – Water, oxidane
  • Other names: Water (H2O) , Hydrogen hydroxide (HH or HOH) , Hydrogen oxide ... show moreDihydrogen monoxide (DHMO) (systematic name) , Hydrogen monoxide , Dihydrogen oxide , Hydric acid , Hydrohydroxic acid , Hydroxic acid , Hydrol , Μ-oxido dihydrogen , Κ1-hydroxyl hydrogen(0) show less
  • Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas
• Fe
  • Names: Iron , Fe , Element 26 ... show moreFer , 26Fe , Eisen , Ferrum , Hierro , Carbonyl iron , Electrolytic iron , Ferrum metallicum , Iron powder , Iron, carbonyl , Iron, electrolytic , Iron, elemental , Iron, reduced , Reduced iron show less

Products:

• H₂
  • Names: Dihydrogen , Hydrogen , H2 ... show moreH₂ , Molecular hydrogen gas , Hydrogen gas , Hydrogen molecule , Molecular hydrogen show less
  • Appearance: Odourless colourless compressed gas
• Fe₃O₄ – Iron(II) iron(III) oxide
  • Other names: Iron(II,III) oxide , Ferrous ferric oxide , Ferroso ferric oxide ... show moreIron(II , III) oxide , Magnetite , Black iron oxide , Lodestone , Rust , Iron(II) diiron(III) oxide , Ferro ferric oxide , Ferric ferrous oxide , Ferrosoferric oxide , Triiron tetraoxide show less
  • Appearance: Solid black powder