3 KMnO₄ (aq) + 5 NO (g) + 3 H₂SO₄ (aq) → 2 HNO₃ (aq) + 3 MnSO₄ (aq) + 3 KNO₃ (aq) + 2 H₂O (l)

This is an oxidation-reduction (redox) reaction:

KMnO₄ is an oxidizing agent, NO is a reducing agent.

Reactants:

• KMnO₄ – Potassium manganate(VII)
  • Other names: Potassium permanganate , Chameleon mineral , Condy's crystals ... show morePermanganate of potash Hypermangan , Permanganic acid potassium salt show less
  • Appearance: Purplish-bronze-gray needles | magenta–rose in solution ; Dark purple crystals
• 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.]
• H₂SO₄ – Sulfuric acid
  • Other names: Oil of vitriol , Sulfuric acid, concentrated (> 51% and < 100%) , H2SO4 ... show moreSulphuric acid , Battery acid , Hydrogen sulfate , [SO2(OH)2] , [S(OH)2O2] , Sulfuric acid (aqueous) show less
  • Appearance: Clear, colorless liquid ; Odourless colourless oily hygroscopic liquid ; Colorless to dark-brown, oily, odorless liquid. [Note: Pure compound is a solid below 51°F. Often used in an aqueous solution.]

Products:

• HNO₃ – Nitric acid
  • Other names: Aqua fortis , Spirit of niter , Eau forte ... show moreHydrogen nitrate , Acidum nitricum , Nitric acid (> 70% in water) , Fuming nitric acid , Engravers acid , HONO2 , Red fuming nitric acid , RFNA , White fuming nitric acid (WFNA) show less
  • Appearance: Colorless, yellow or red fuming liquid ; Colourless-to-yellow liquid with pungent odour ; 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.]
• MnSO₄ – Manganese(II) sulfate
  • Other names: MnSO4 , Manganese sulfate anhydrous , Manganese sulphate ... show moreManganous sulfate , Manganese monosulfate , Manganese(2+) sulphate , Manganese(II) sulphate , Manganese(2+) sulfate , Manganese sulfate show less
  • Appearance: White crystals (anhydrous) | pale pink solid (hydrates)
• KNO₃ – Potassium nitrate
  • Other names: Saltpeter , Saltpetre , Nitrate of potash ... show moreNitric acid, potassium salt , Niter , Salt peter , Nitre show less
  • Appearance: White solid ; Colourless-to-white crystalline powder
• 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