4 KOH + 2 Br2 KBrO2 + 3 KBr + 2 H2O

This is an oxidation-reduction (redox) reaction:

3 Br0 + 3 e- 3 Br-I (reduction)

Br0 - 3 e- BrIII (oxidation)

Br2 is both an oxidizing and a reducing agent (disproportionation).

Reactants:

  • 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:

  • KBrO2
  • 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