CrO3 + 2 H2 → CrO + 2 H2O

This is an oxidation-reduction (redox) reaction:

4 H0 - 4 e- → 4 HI (oxidation)

CrVI + 4 e- → CrII (reduction)

H2 is a reducing agent, CrO3 is an oxidizing agent.

Reactants:

  • CrO3 – Chromium trioxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Other names: Chromic anhydride source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Chromium(VI) oxide source: wikipedia, accessed: 2019-09-27, Chromic acid (misnomer) source: wikipedia, accessed: 2019-09-27
    • Appearance: Dark red granular solid, deliquescent source: wikipedia, accessed: 2019-09-27; Odourless dark red deliquescent crystals, flakes or granular powder source: ICSC, accessed: 2019-09-04
  • H2
    • Names: Dihydrogen source: wikidata, accessed: 2019-09-07, Hydrogen source: ICSC, accessed: 2019-09-04source: wikidata, accessed: 2019-09-07, H2 source: wikidata, accessed: 2019-09-07
    • Appearance: Odourless colourless compressed gas source: ICSC, accessed: 2019-09-04

Products:

  • CrO
    • Names: Chromium(II) oxide source: wikidata, accessed: 2019-09-02
  • 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