HIO4 + 7 KI + 7 CH3COOH → 4 I2 + 7 CH3COOK + 4 H2O

This is an oxidation-reduction (redox) reaction:

7 I-I - 7 e- → 7 I0 (oxidation)

IVII + 7 e- → I0 (reduction)

KI is a reducing agent, HIO4 is an oxidizing agent (synproportionation (comproportionation)).

Reactants:

  • HIO4
    • Names: Metaperiodic acid source: wikidata, accessed: 2019-09-04, Periodic acid source: wikidata, accessed: 2019-09-04
  • KI
    • Names: Potassium iodide source: wikidata, accessed: 2019-09-02, KI source: wikidata, accessed: 2019-09-02, Thyrosafe source: wikidata, accessed: 2019-09-02
  • CH3COOH – Acetic acid source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-07source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Ethanoic acid source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-07source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02
    • Other names: Vinegar (when dilute); Hydrogen acetate; Methanecarboxylic acid source: wikipedia, accessed: 2019-09-27, Methanecarboxylic acid source: wikidata, accessed: 2019-09-07source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, CH3-COOH source: wikidata, accessed: 2019-09-07
    • Appearance: Colourless liquid source: wikipedia, accessed: 2019-09-27; Colourless liquid with pungent odour source: ICSC, accessed: 2019-09-04; Colorless liquid or crystals with a sour, vinegar-like odor. [Note: Pure compound is a solid below 62°F. Often used in an aqueous solution.] source: NIOSH NPG, accessed: 2019-09-02

Products:

  • I2
    • Names: Iodine source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Jod source: ICSC, accessed: 2019-09-04, Iode source: ICSC, accessed: 2019-09-04
    • Appearance: Bluish black or dark purple crystals with pungent odour source: ICSC, accessed: 2019-09-04; Violet solid with a sharp, characteristic odor. source: NIOSH NPG, accessed: 2019-09-02
  • CH3COOK
    • Names: Potassium acetate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Potassium salt source: wikipedia, accessed: 2019-09-27, E261 source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Appearance: White deliquescent crystalline powder source: wikipedia, accessed: 2019-09-27; White flakes or crystalline powder source: ICSC, accessed: 2019-09-04
  • 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