2 NaN3 + 2 HNO2 → 3 N2 + 2 NaOH + 2 NO

This is an oxidation-reduction (redox) reaction:

2 N-1/3 - 14/3 e- → 2 NII (oxidation)

6 N-1/3 - 2 e- → 6 N0 (oxidation)

2 NIII + 2 e- → 2 NII (reduction)

2 NIII + 6 e- → 2 N0 (reduction)

NaN3 is a reducing agent, NaN3 is a reducing agent, HNO2 is an oxidizing agent, HNO2 is an oxidizing agent.

Reactants:

  • NaN3
    • Names: Sodium azide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Sodium trinitride source: wikipedia, accessed: 2019-09-27, Smite source: wikipedia, accessed: 2019-09-27
    • Appearance: Colorless to white solid source: wikipedia, accessed: 2019-09-27; Colourless hexagonal crystals source: ICSC, accessed: 2019-09-04; Colorless to white, odorless, crystalline solid. [pesticide] [Note: Forms hydrazoic acid (HN3) in water.] source: NIOSH NPG, accessed: 2019-09-02
  • HNO2 – Nitrous acid source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Hydroxidooxidonitrogen source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Other names: HNO2 source: wikidata, accessed: 2019-09-02, [NO(OH)] source: wikidata, accessed: 2019-09-02, Nitrosyl hydroxide source: wikidata, accessed: 2019-09-02, Dioxonitric acid source: wikidata, accessed: 2019-09-02
    • Appearance: Pale blue solution source: wikipedia, accessed: 2019-09-27

Products:

  • N2
    • Names: Dinitrogen source: wikidata, accessed: 2019-09-07, Nitrogen (compressed gas) source: ICSC, accessed: 2019-09-04, Nitrogen (liquified) source: ICSC, accessed: 2019-09-04
    • Appearance: Odourless colourless compressed gas source: ICSC, accessed: 2019-09-04; Odourless colourless extremely cold liquid source: ICSC, accessed: 2019-09-04
  • 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
  • NO – Nitrogen monoxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: NIOSH NPG, accessed: 2019-09-02, Oxidonitrogen(•) (additive) source: wikipedia, accessed: 2019-09-27
    • Other names: Nitric oxide source: wikipedia, accessed: 2019-09-27source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02source: wikidata, accessed: 2019-09-02, Nitrogen(II) oxide source: wikipedia, accessed: 2019-09-27, Nitric oxide (radical) source: wikidata, accessed: 2019-09-02
    • Appearance: Colourless gas source: wikipedia, accessed: 2019-09-27; Colourless compressed gas source: ICSC, accessed: 2019-09-04; Colorless gas. [Note: Shipped as a nonliquefied compressed gas.] source: NIOSH NPG, accessed: 2019-09-02