Br2 (aq) + 2 NaClO3 (aq) Cl2 (g) + 2 NaBrO3 (aq)

This is an oxidation-reduction (redox) reaction:

2 Br0 - 10 e- 2 BrV (oxidation)

2 ClV + 10 e- 2 Cl0 (reduction)

Br2 is a reducing agent, NaClO3 is an oxidizing agent.

This is a gas evolution reaction, Cl2 is the formed gas.

Reactants:

  • Br2
    • Names: Bromine source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Molecular bromine source: NIOSH NPG, accessed: 2019-09-02
    • Appearance: Fuming red-to-brown liquid with pungent odour source: ICSC, accessed: 2019-09-04; Dark reddish-brown, fuming liquid with suffocating, irritating fumes. 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:

  • 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
  • NaBrO3Sodium bromate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04
    • Other names: Sodium bromate(V) source: wikipedia, accessed: 2019-09-27, Bromic acid source: wikipedia, accessed: 2019-09-27, Sodium salt source: wikipedia, accessed: 2019-09-27
    • Appearance: Colorless or white solid source: wikipedia, accessed: 2019-09-27; Colourless crystals source: ICSC, accessed: 2019-09-04