(Fe)3+ + NO2 + H2O → (Fe)2+ + NO3- + 2 H+

This is an oxidation-reduction (redox) reaction:

NIV - 1 e- → NV (oxidation)

FeIII + e- → FeII (reduction)

NO2 is a reducing agent, Fe3+ is an oxidizing agent.

Reactants:

  • Fe3+
  • NO2 – Nitrogen dioxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02
    • Other names: Nitrogen(IV) oxide source: wikipedia, accessed: 2019-09-27, Deutoxide of nitrogen source: wikipedia, accessed: 2019-09-27, Nitrogen peroxide source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02
    • Appearance: Brown gas source: wikipedia, accessed: 2019-09-27; Reddish-brown gas or brown or yellow liquid with pungent odour source: ICSC, accessed: 2019-09-04; Yellowish-brown liquid or reddish-brown gas (above 70°F) with a pungent, acrid odor. [Note: In solid form (below 15°F) it is found structurally as N2O4.] source: NIOSH NPG, accessed: 2019-09-02
  • 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

Products:

  • Fe2+
  • NO3- – Nitrate source: wikipedia, accessed: 2019-09-27
    • Other names: Nitrate ion source: wikidata, accessed: 2019-09-07, NO3(-) source: wikidata, accessed: 2019-09-07, [NO3](-) source: wikidata, accessed: 2019-09-07
  • H+