2 HMnO4 + 5 HNO2 2 Mn(NO3)2 + HNO3 + 3 H2O

This is an oxidation-reduction (redox) reaction:

2 MnVII + 10 e- 2 MnII (reduction)

5 NIII - 10 e- 5 NV (oxidation)

HMnO4 is an oxidizing agent, HNO2 is a reducing agent.

Reactants:

  • HMnO4
    • Names: Permanganic acid source: wikidata, accessed: 2019-09-02, Manganic(VII) acid source: wikidata, accessed: 2019-09-02, HMnO4 source: wikidata, accessed: 2019-09-02, [MnO3(OH)] source: wikidata, accessed: 2019-09-02
  • HNO2Nitrous 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:

  • Mn(NO3)2Manganese(II) nitrate source: wikipedia, accessed: 2019-09-27
    • Other names: Manganese dinitrate source: wikipedia, accessed: 2019-09-27, Manganese nitrate source: wikidata, accessed: 2019-09-02
    • Appearance: White powder source: wikipedia, accessed: 2019-09-27
  • HNO3Nitric acid source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: NIOSH NPG, accessed: 2019-09-02
    • Other names: Aqua fortis source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: NIOSH NPG, accessed: 2019-09-02, Spirit of niter source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Eau forte source: wikipedia, accessed: 2019-09-27
    • Appearance: Colorless, yellow or red fuming liquid source: wikipedia, accessed: 2019-09-27; Colourless-to-yellow liquid with pungent odour source: ICSC, accessed: 2019-09-04; Colorless, yellow, or red, fuming liquid with an acrid, suffocating odor. [Note: Often used in an aqueous solution. Fuming nitric acid is concentrated nitric acid that contains dissolved nitrogen dioxide.] source: NIOSH NPG, accessed: 2019-09-02
  • H2OWater, 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