6 Ba(OH)2 (aq) + 6 Cl2 (g) → Ba(ClO3)2 (aq) + 5 BaCl2 (aq) + 6 H2O (l)

This is an oxidation-reduction (redox) reaction:

10 Cl0 + 10 e- → 10 Cl-I (reduction)

2 Cl0 - 10 e- → 2 ClV (oxidation)

Cl2 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
  • 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

Products:

  • Ba(ClO3)2 – Barium dichlorate source: wikipedia, accessed: 2019-09-27
    • Other names: Barium chlorate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Chloric acid source: wikipedia, accessed: 2019-09-27, Barium salt source: wikipedia, accessed: 2019-09-27, Chloric acid, barium salt source: ICSC, accessed: 2019-09-04
    • Appearance: White solid source: wikipedia, accessed: 2019-09-27; Colourless crystalline powder source: ICSC, accessed: 2019-09-04
  • BaCl2
    • Names: Barium chloride source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Barium muriate source: wikipedia, accessed: 2019-09-27, Muryate of Barytes source: wikipedia, accessed: 2019-09-27
    • Appearance: White solid source: wikipedia, accessed: 2019-09-27; Odourless colourless crystals source: ICSC, accessed: 2019-09-04; White, odorless solid. source: NIOSH NPG, accessed: 2019-09-02
  • H2O – Water, oxidane source: wikipedia, accessed: 2019-09-27
    • Other names: Water (H2O) source: wikipedia, accessed: 2019-09-27, Hydrogen hydroxide (HH or HOH) source: wikipedia, accessed: 2019-09-27, Hydrogen oxide source: wikipedia, accessed: 2019-09-27
    • Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas source: wikipedia, accessed: 2019-09-27