PCl₃ + 3 H₂O → H₃PO₃ + 3 HCl

Reactants:

• PCl₃ – Phosphorus trichloride
  • Other names: Phosphorus(III) chloride , Phosphorous chloride , [PCl3] ... show morePCl3 , Trichlorophosphine , Phosphorus chloride [Phosphorus trichloride] show less
  • Appearance: Colorless to yellow fuming liquid ; Colourless or yellow fuming liquid with pungent odour ; Colorless to yellow, fuming liquid with an odor like hydrochloric acid.
• 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:

• H₃PO₃ – Phosphonic acid
  • Other names: Phosphorous acid , Dihydroxyphosphine oxide
  • Appearance: White solid | deliquescent
• HCl – Chlorane , Hydrogen chloride
  • Other names: Hydrochloric acid , M , Uriatic acid ... show moreHydronium chloride , Chlorhydric Acid , Hydrochloric acid gas , HCl , Anhydrous 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.]