I2 (s) + 2 NaClO3 (aq) 2 NaIO3 (aq) + Cl2 (g)

This is an oxidation-reduction (redox) reaction:

2 I0 - 10 e- 2 IV (oxidation)

2 ClV + 10 e- 2 Cl0 (reduction)

I2 is a reducing agent, NaClO3 is an oxidizing agent.

Reactants:

  • I2
    • Names: Iodine source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Jod source: ICSC, accessed: 2019-09-04, Iode source: ICSC, accessed: 2019-09-04
    • Appearance: Bluish black or dark purple crystals with pungent odour source: ICSC, accessed: 2019-09-04; Violet solid with a sharp, characteristic odor. source: NIOSH NPG, accessed: 2019-09-02
  • NaClO3Sodium chlorate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04
    • Other names: Sodium chlorate(V) source: wikipedia, accessed: 2019-09-27, Chloric acid, sodium salt source: ICSC, accessed: 2019-09-04
    • Appearance: Colorless or white solid, hygroscopic source: wikipedia, accessed: 2019-09-27; Odourless colourless crystals or white granules source: ICSC, accessed: 2019-09-04

Products:

  • NaIO3
    • Names: Sodium iodate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Iodic acid source: wikipedia, accessed: 2019-09-27, Sodium salt source: wikipedia, accessed: 2019-09-27
    • Appearance: White orthorhombic crystals source: wikipedia, accessed: 2019-09-27
  • Cl2
    • Names: Chlorine source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Molecular chlorine source: NIOSH NPG, accessed: 2019-09-02
    • Appearance: Greenish-yellow compressed liquefied gas with pungent odour source: ICSC, accessed: 2019-09-04; Greenish-yellow gas with a pungent, irritating odor. [Note: Shipped as a liquefied compressed gas.] source: NIOSH NPG, accessed: 2019-09-02