2 MnO₄^- + 3 NO₂^- + H₂O → 2 MnO₂ + 3 NO₃^- + 2 OH^-

This is an oxidation-reduction (redox) reaction:

MnO₄^- is an oxidizing agent, NO₂^- is a reducing agent.

Reactants:

• MnO₄^-
• 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
• 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

Products:

• MnO₂ – Manganese oxide , Manganese(IV) oxide
  • Other names: Manganese dioxide , Pyrolusite , Hyperoxide of manganese ... show moreBlack oxide of manganese , Manganic oxide , MnO2 , MnO₂ , Manganese(IV)oxide , Manganese peroxide show less
  • Appearance: Brown-black solid ; Black-to-brown powder
• NO₃^- – Nitrate
  • Other names: Nitrate ion , NO3(-) , [NO3](-) ... show moreNitrate(1-) , NO3 , Trioxonitrate , Isosorbide Dinitrate , Gynazole-1 , Nitric acid , Sorbitrate , Trioxidonitrate , Ganite , Econazole Nitrate , Femstat 3 , Isordil , Nitrooxidane show less
• OH^- – Hydroxide
  • Other names: Hydroxide ion