IO3- + 5 (I)- + 3 H2O 3 I2 + 6 OH-

This is an oxidation-reduction (redox) reaction:

5 I-I - 5 e- 5 I0 (oxidation)

IV + 5 e- I0 (reduction)

I- is a reducing agent, IO3- is an oxidizing agent (synproportionation (comproportionation)).

Reactants:

  • IO3-
  • I-
  • H2OWater, 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

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
  • OH-Hydroxide source: wikipedia, accessed: 2019-09-27
    • Other names: Hydroxide ion source: wikidata, accessed: 2019-09-07