2 HCl + SnCl₂ + 2 HNO₂ → 2 H₂O + 2 NO + SnCl₄

This is an oxidation-reduction (redox) reaction:

SnCl₂ is a reducing agent, HNO₂ is an oxidizing agent.

Reactants:

• HCl – Chlorane , Hydrogen chloride
  • Other names: Hydrochloric acid , Hydrochloric acid gas , HCl ... show moreAnhydrous hydrogen chloride , Hydrochloric acid, anhydrous , Aqueous hydrogen chloride , [Note: Often used in an aqueous solution.] show less
  • Appearance: Colorless, transparent liquid, fumes in air if concentrated ; Colorless gas ; Colourless compressed liquefied gas with pungent odour ; Colorless to slightly yellow gas with a pungent, irritating odor. [Note: Shipped as a liquefied compressed gas.]
• SnCl₂ – Tin(II) chloride , Tin dichloride
  • Other names: Stannous chloride , Tin salt , Tin protochloride ... show moreTin (ii) chloride (anhydrous) , Stannous chloride (anhydrous) , Stannous chloride (anh.) , Tin dichloride (anhydrous) , Tin(II) chloride (anhydrous) , SnCl2 , Tin(II) chloride (anh.) , Stannous chloride anhydrous , Stannous chloride,anhydrous show less
  • Appearance: White crystalline solid ; Colourless or white crystals
• HNO₂ – Nitrous acid , Hydroxidooxidonitrogen
  • Other names: HNO2 , [NO(OH)] , Nitrosyl hydroxide , Dioxonitric acid
  • Appearance: Pale blue solution

Products:

• 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
• 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.]
• SnCl₄ – Tetrachlorostannane , Tin tetrachloride , Tin(IV) chloride
  • Other names: Stannic chloride , Tin(iv) chloride (anhydrous)
  • Appearance: Colorless to slightly yellow fuming liquid ; Colourless or slightly yellow fuming liquid with pungent odour