26 H2O + 21 Cl2 + 2 CrI3 → 42 HCl + 6 HIO3 + 2 H2CrO4

This is an oxidation-reduction (redox) reaction:

42 Cl0 + 42 e- → 42 Cl-I (reduction)

6 I-I - 36 e- → 6 IV (oxidation)

2 CrIII - 6 e- → 2 CrVI (oxidation)

Cl2 is an oxidizing agent, CrI3 is a reducing agent, CrI3 is a reducing agent.

Reactants:

  • 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
  • Cl2
    • Names: Chlorine source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Molecular chlorine source: NIOSH NPG, accessed: 2019-09-02
    • Appearance: Greenish-yellow compressed liquefied gas with pungent odour source: ICSC, accessed: 2019-09-04; Greenish-yellow gas with a pungent, irritating odor. [Note: Shipped as a liquefied compressed gas.] source: NIOSH NPG, accessed: 2019-09-02
  • CrI3 – Chromium(III) iodide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Other names: Chromium triiodide source: wikipedia, accessed: 2019-09-27, Chromic iodide source: wikipedia, accessed: 2019-09-27
    • Appearance: Black solid source: wikipedia, accessed: 2019-09-27

Products:

  • HCl – Chlorane source: wikipedia, accessed: 2019-09-27, Hydrogen chloride source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02
    • Other names: Hydrochloric acid source: wikipedia, accessed: 2019-09-27source: NIOSH NPG, accessed: 2019-09-02, Hydrochloric acid gas source: wikipedia, accessed: 2019-09-27, HCl source: wikidata, accessed: 2019-09-02
    • Appearance: Colorless, transparent liquid, fumes in air if concentrated source: wikipedia, accessed: 2019-09-27; Colorless gas source: wikipedia, accessed: 2019-09-27; Colourless compressed liquefied gas with pungent odour source: ICSC, accessed: 2019-09-04; Colorless to slightly yellow gas with a pungent, irritating odor. [Note: Shipped as a liquefied compressed gas.] source: NIOSH NPG, accessed: 2019-09-02
  • HIO3
    • Names: Iodic acid source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Iodic(V) acid source: wikipedia, accessed: 2019-09-27, [IO2(OH)] source: wikidata, accessed: 2019-09-02
    • Appearance: White solid source: wikipedia, accessed: 2019-09-27
  • H2CrO4 – Chromic acid source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Dihydroxidodioxidochromium source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Other names: Chromic(VI) acid source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Tetraoxochromic acid source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Sternochromicmaxidochorodium source: wikidata, accessed: 2019-09-02