3 H2 + Cr2O3 2 Cr + 3 H2O

This is an oxidation-reduction (redox) reaction:

6 H0 - 6 e- 6 HI (oxidation)

2 CrIII + 6 e- 2 Cr0 (reduction)

H2 is a reducing agent, Cr2O3 is an oxidizing agent.

Reactants:

  • H2
    • Names: Dihydrogen source: wikidata, accessed on: 2019-09-07, Hydrogen source: ICSC, accessed on: 2019-09-04source: wikidata, accessed on: 2019-09-07, H2 source: wikidata, accessed on: 2019-09-07
    • Appearance: Odourless colourless compressed gas source: ICSC, accessed on: 2019-09-04
  • Cr2O3
    • Names: Chromium(III) oxide source: wikipedia, accessed on: 2019-09-27, Chromium sesquioxide source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02, Chromia source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02
    • Appearance: Light to dark green, fine crystals source: wikipedia, accessed on: 2019-09-27; Light-to-dark-green powder source: ICSC, accessed on: 2019-09-04

Products:

  • Cr
    • Names: Chromium source: wikidata, accessed on: 2019-09-07source: ICSC, accessed on: 2019-09-04source: NIOSH NPG, accessed on: 2019-09-02, Chromium metal source: NIOSH NPG, accessed on: 2019-09-02, Cr source: wikidata, accessed on: 2019-09-07
    • Appearance: Grey powder source: ICSC, accessed on: 2019-09-04; Blue-white to steel-gray, lustrous, brittle, hard, odorless solid. source: NIOSH NPG, accessed on: 2019-09-02
  • H2OWater, oxidane source: wikipedia, accessed on: 2019-09-27
    • Other names: Water (H2O) source: wikipedia, accessed on: 2019-09-27, Hydrogen hydroxide (HH or HOH) source: wikipedia, accessed on: 2019-09-27, Hydrogen oxide source: wikipedia, accessed on: 2019-09-27
    • Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas source: wikipedia, accessed on: 2019-09-27