3 Ba(OH)2 + 6 I2 → Ba(IO3)2 + 2 BaI2 + 6 HI

This is an oxidation-reduction (redox) reaction:

10 I0 + 10 e- → 10 I-I (reduction)

2 I0 - 10 e- → 2 IV (oxidation)

I2 is both an oxidizing and a reducing agent (disproportionation (dismutation)).

Reactants:

  • Ba(OH)2
    • Names: Barium hydroxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Caustic baryta source: wikidata, accessed: 2019-09-02, Barium hydroxide lime source: wikidata, accessed: 2019-09-02, Ba(OH)2 source: wikidata, accessed: 2019-09-02
    • Appearance: White solid source: wikipedia, accessed: 2019-09-27
  • 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

Products:

  • Ba(IO3)2
    • Names: Barium iodate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Ba(IO3)2 source: wikidata, accessed: 2019-09-02
  • BaI2 – Barium iodide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Other names: Anhydrous source: wikipedia, accessed: 2019-09-27
    • Appearance: White orthorhombic crystals (anhydrous) colorless crystals (dihydrate) source: wikipedia, accessed: 2019-09-27
  • HI – Iodane source: wikipedia, accessed: 2019-09-27
    • Other names: Hydroiodic acid source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Hydrogen iodide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Hydronium iodide source: wikipedia, accessed: 2019-09-27
    • Appearance: Colorless liquid source: wikipedia, accessed: 2019-09-27; Colorless gas source: wikipedia, accessed: 2019-09-27; Colourless compressed liquefied gas with pungent odour source: ICSC, accessed: 2019-09-04