Bi2O3 + 6 KOH + 2 Br2 2 KBiO3 + 4 KBr + 3 H2O

This is an oxidation-reduction (redox) reaction:

4 Br0 + 4 e- 4 Br-I (reduction)

2 BiIII - 4 e- 2 BiV (oxidation)

Br2 is an oxidizing agent, Bi2O3 is a reducing agent.

Reactants:

  • Bi2O3Bismuth trioxide source: wikipedia, accessed on: 2019-09-27, Bismuth(III) oxide source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02, Bismite (mineral) source: wikipedia, accessed on: 2019-09-27
    • Other names: Bismite source: wikipedia, accessed on: 2019-09-27, Bismuth sesquioxide source: wikipedia, accessed on: 2019-09-27
    • Appearance: Yellow crystals or powder source: wikipedia, accessed on: 2019-09-27
  • KOHPotassium hydroxide source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02source: ICSC, accessed on: 2019-09-04source: NIOSH NPG, accessed on: 2019-09-02
    • Other names: Caustic potash source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02source: ICSC, accessed on: 2019-09-04source: NIOSH NPG, accessed on: 2019-09-02, Lye source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02, Potash lye source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02
    • Appearance: White solid, deliquescent source: wikipedia, accessed on: 2019-09-27; White hygroscopic solid in various forms source: ICSC, accessed on: 2019-09-04; Odorless, white or slightly yellow lumps, rods, flakes, sticks, or pellets. [Note: May be used as an aqueous solution.] source: NIOSH NPG, accessed on: 2019-09-02
  • Br2
    • Names: Bromine source: ICSC, accessed on: 2019-09-04source: NIOSH NPG, accessed on: 2019-09-02, Molecular bromine source: NIOSH NPG, accessed on: 2019-09-02
    • Appearance: Fuming red-to-brown liquid with pungent odour source: ICSC, accessed on: 2019-09-04; Dark reddish-brown, fuming liquid with suffocating, irritating fumes. source: NIOSH NPG, accessed on: 2019-09-02

Products:

  • KBiO3
    • Names: Potassium bismuthate source: wikidata, accessed on: 2019-09-03
  • KBr
    • Names: Potassium bromide source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02, KBr source: wikidata, accessed on: 2019-09-02, Kaliumbromid source: wikidata, accessed on: 2019-09-02
    • Appearance: White solid source: wikipedia, accessed on: 2019-09-27
  • H2OWater, oxidane source: wikipedia, accessed on: 2019-09-27
    • Other names: Water (H2O) source: wikipedia, accessed on: 2019-09-27, Hydrogen hydroxide (HH or HOH) source: wikipedia, accessed on: 2019-09-27, Hydrogen oxide source: wikipedia, accessed on: 2019-09-27
    • Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas source: wikipedia, accessed on: 2019-09-27