6 NaOH + 2 Al → 3 H2 + 2 Na2O + 2 NaAlO2

This is an oxidation-reduction (redox) reaction:

6 HI + 6 e- → 6 H0 (reduction)

2 Al0 - 6 e- → 2 AlIII (oxidation)

NaOH is an oxidizing agent, Al is a reducing agent.

Reactants:

  • NaOH
    • Names: Sodium hydroxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Caustic soda source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Lye source: wikidata, accessed: 2019-09-02
    • Appearance: White, waxy, opaque crystals source: wikipedia, accessed: 2019-09-27; White hygroscopic solid in various forms source: ICSC, accessed: 2019-09-04; Colorless to white, odorless solid (flakes, beads, granular form). source: NIOSH NPG, accessed: 2019-09-02
  • Al
    • Names: Aluminum source: wikidata, accessed: 2019-09-07source: NIOSH NPG, accessed: 2019-09-02, Aluminium powder source: ICSC, accessed: 2019-09-04, Al source: wikidata, accessed: 2019-09-07
    • Appearance: Silvery-white-to-grey powder source: ICSC, accessed: 2019-09-04; Silvery-white, malleable, ductile, odorless metal. source: NIOSH NPG, accessed: 2019-09-02

Products:

  • 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
  • Na2O – Sodium oxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04
    • Other names: Disodium oxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Sodium monoxide source: ICSC, accessed: 2019-09-04, Disodium monoxide source: ICSC, accessed: 2019-09-04
    • Appearance: White solid source: wikipedia, accessed: 2019-09-27; White lumps or powder source: ICSC, accessed: 2019-09-04
  • NaAlO2
    • Names: Sodium aluminate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Sodium aluminium oxide source: wikipedia, accessed: 2019-09-27, Sodium metaaluminate source: wikipedia, accessed: 2019-09-27
    • Appearance: White powder (sometimes light-yellowish) | hygroscopic/ when dissolved in water a colloidal black solution is formed source: wikipedia, accessed: 2019-09-27; White hygroscopic powder source: ICSC, accessed: 2019-09-04