NO₂^- + (Fe)²⁺ + 2 H⁺ → (Fe)³⁺ + NO + H₂O

This is an oxidation-reduction (redox) reaction:

NO₂^- is an oxidizing agent, Fe²⁺ is a reducing agent.

Reactants:

• NO₂^- – Dioxidonitrate(1−)
  • Other names: Nitrite , Nitrite ion , NO2(-) ... show more[NO2](-) , Nitrit , Nitrous acid, ion(1-) , Nitrite anion , Nitrite(1-) , NO2 , Nitrogen peroxide ion , Nitrogen dioxide , Nitrogen dioxide ion show less
• Fe²⁺
• H⁺

Products:

• Fe³⁺
• NO – Nitrogen monoxide , Oxidonitrogen(•) (additive)
  • Other names: Nitric oxide , Nitrogen(II) oxide , Nitric oxide (radical) ... show moreMononitrogen monoxide , (.)NO , EDRF , Nitrogen monooxide , [NO] , Oxido de nitrogeno(ii) , NO(.) , Oxido nitrico , Stickstoff(ii)-oxid , NO , Oxyde azotique , Oxyde nitrique , Stickstoffmonoxid , Nitrosyl , (NO)(.) , Monoxido de nitrogeno , Endothelium-derived relaxing factor , Nitroxide radical , Nitroxyl , Nitrosyl radical , Hydroxyamine , Nitrogen oxide , Nitrogen protoxide , Nitrosyl hydride , Nitric Oxide show less
  • Appearance: Colourless gas ; Colourless compressed gas ; Colorless gas. [Note: Shipped as a nonliquefied compressed gas.]
• H₂O – Water, oxidane
  • Other names: Water (H2O) , Hydrogen hydroxide (HH or HOH) , Hydrogen oxide ... show moreDihydrogen monoxide (DHMO) (systematic name) , Hydrogen monoxide , Dihydrogen oxide , Hydric acid , Hydrohydroxic acid , Hydroxic acid , Hydrol , Μ-oxido dihydrogen , Κ1-hydroxyl hydrogen(0) show less
  • Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas