NaIO₃ (aq) + 5 NaI (aq) + 3 H₂O (l) → 3 I₂ (s) + 6 NaOH (aq)

This is an oxidation-reduction (redox) reaction:

NaI is a reducing agent, NaIO₃ is an oxidizing agent (synproportionation (comproportionation)).

Reactants:

• NaIO₃
  • Names: Sodium iodate , Iodic acid , Sodium salt
  • Appearance: White orthorhombic crystals
• NaI
  • Names: Sodium iodide , Sodium iodide (anhydrous) , NaI , Sodium monoiodide
  • Appearance: White solid | deliquescent ; Colourless-to-white hygroscopic crystals or white powder. turns brown on exposure to air
• 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:

• I₂
  • Names: Iodine , Jod , Iode ... show moreIodio , Yodo , Iodine crystals , Molecular iodine show less
  • Appearance: Bluish black or dark purple crystals with pungent odour ; Violet solid with a sharp, characteristic odor.
• NaOH
  • Names: Sodium hydroxide , Caustic soda , Lye ... show moreSoda lye , Sodium hydrate , NaOH , White caustic , Lye [Sodium hydroxide] show less
  • Appearance: White, waxy, opaque crystals ; White hygroscopic solid in various forms ; Colorless to white, odorless solid (flakes, beads, granular form).