2 HIO3 + 10 FeSO4 + 5 H2SO4 I2 + 5 Fe2(SO4)3 + 6 H2O

This is an oxidation-reduction (redox) reaction:

2 IV + 10 e- 2 I0 (reduction)

10 FeII - 10 e- 10 FeIII (oxidation)

HIO3 is an oxidizing agent, FeSO4 is a reducing agent.

Reactants:

  • HIO3
    • Names: Iodic acid source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02, Iodic(V) acid source: wikipedia, accessed on: 2019-09-27, [IO2(OH)] source: wikidata, accessed on: 2019-09-02
    • Appearance: White solid source: wikipedia, accessed on: 2019-09-27
  • FeSO4Iron(II) sulphate source: wikipedia, accessed on: 2019-09-27
    • Other names: Iron(II) sulfate source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02, Ferrous sulfate source: wikipedia, accessed on: 2019-09-27, Green vitriol source: wikipedia, accessed on: 2019-09-27
    • Appearance: White crystals (anhydrous) | White-yellow crystals (monohydrate) | Blue-green crystals (heptahydrate) source: wikipedia, accessed on: 2019-09-27
  • H2SO4Sulfuric acid source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-07source: NIOSH NPG, accessed on: 2019-09-02
    • Other names: Oil of vitriol source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-07source: ICSC, accessed on: 2019-09-04source: NIOSH NPG, accessed on: 2019-09-02, Sulfuric acid, concentrated (> 51% and < 100%) source: ICSC, accessed on: 2019-09-04, H2SO4 source: wikidata, accessed on: 2019-09-07
    • Appearance: Clear, colorless liquid source: wikipedia, accessed on: 2019-09-27; Odourless colourless oily hygroscopic liquid source: ICSC, accessed on: 2019-09-04; Colorless to dark-brown, oily, odorless liquid. [Note: Pure compound is a solid below 51°F. Often used in an aqueous solution.] source: NIOSH NPG, accessed on: 2019-09-02

Products:

  • I2
    • Names: Iodine source: ICSC, accessed on: 2019-09-04source: NIOSH NPG, accessed on: 2019-09-02, Jod source: ICSC, accessed on: 2019-09-04, Iode source: ICSC, accessed on: 2019-09-04
    • Appearance: Bluish black or dark purple crystals with pungent odour source: ICSC, accessed on: 2019-09-04; Violet solid with a sharp, characteristic odor. source: NIOSH NPG, accessed on: 2019-09-02
  • Fe2(SO4)3Iron(III) sulfate source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02
    • Other names: Ferric sulfate source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02, Sulfuric acid source: wikipedia, accessed on: 2019-09-27, Iron(3+) salt (3:2) source: wikipedia, accessed on: 2019-09-27
    • Appearance: Grayish-white crystals 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