Sb2O3 + 2 Br2 + 10 NaOH → 2 Na3SbO4 + 4 NaBr + 5 H2O

This is an oxidation-reduction (redox) reaction:

4 Br0 + 4 e- → 4 Br-I (reduction)

2 SbIII - 4 e- → 2 SbV (oxidation)

Br2 is an oxidizing agent, Sb2O3 is a reducing agent.

Reactants:

  • Sb2O3 – Antimony(III) oxide source: wikipedia, accessed: 2019-09-27source: ICSC, accessed: 2019-09-04
    • Other names: Antimony sesquioxide source: wikipedia, accessed: 2019-09-27source: ICSC, accessed: 2019-09-04, Antimonous oxide source: wikipedia, accessed: 2019-09-27, Flowers of Antimony source: wikipedia, accessed: 2019-09-27
    • Appearance: White solid source: wikipedia, accessed: 2019-09-27; White crystalline odourless powder source: ICSC, accessed: 2019-09-04
  • 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
  • NaOH
    • Names: Sodium hydroxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Caustic soda source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Lye source: wikidata, accessed: 2019-09-02
    • Appearance: White, waxy, opaque crystals source: wikipedia, accessed: 2019-09-27; White hygroscopic solid in various forms source: ICSC, accessed: 2019-09-04; Colorless to white, odorless solid (flakes, beads, granular form). source: NIOSH NPG, accessed: 2019-09-02

Products:

  • Na3SbO4
  • NaBr – Sodium bromide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Other names: Bromide salt of sodium source: wikidata, accessed: 2019-09-02, Trisodium tribromide source: wikidata, accessed: 2019-09-02, NaBr source: wikidata, accessed: 2019-09-02
    • Appearance: White powder, hygroscopic source: wikipedia, accessed: 2019-09-27
  • 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