NiO (s) + H2 (g) → Ni (s) + H2O (l)

This is an oxidation-reduction (redox) reaction:

2 H0 - 2 e- → 2 HI (oxidation)

NiII + 2 e- → Ni0 (reduction)

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

Reactants:

  • NiO – Nickel(II) oxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Other names: Nickel monoxide source: wikipedia, accessed: 2019-09-27source: ICSC, accessed: 2019-09-04, Oxonickel source: wikipedia, accessed: 2019-09-27, Nickel(ii)oxide source: ICSC, accessed: 2019-09-04, Nickelous oxide source: ICSC, accessed: 2019-09-04
    • Appearance: Green crystalline solid source: wikipedia, accessed: 2019-09-27; Green-to-black crystalline 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:

  • Ni
    • Names: Nickel source: wikidata, accessed: 2019-09-07source: ICSC, accessed: 2019-09-04, Ni source: wikidata, accessed: 2019-09-07, Element 28 source: wikidata, accessed: 2019-09-07
    • Appearance: Silvery metallic lustrous solid in various forms source: ICSC, accessed: 2019-09-04
  • 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