7 I2 + 5 Cl2O7 → 5 Cl2 + 7 I2O5

This is an oxidation-reduction (redox) reaction:

14 I0 - 70 e- → 14 IV (oxidation)

10 ClVII + 70 e- → 10 Cl0 (reduction)

I2 is a reducing agent, Cl2O7 is an oxidizing agent.

Reactants:

  • 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
  • Cl2O7 – Dichlorine heptoxide source: wikipedia, accessed: 2019-09-27
    • Other names: Chlorine(VII) oxide; Perchloric anhydride; (Perchloryloxy)chlorane trioxide source: wikipedia, accessed: 2019-09-27
    • Appearance: Colorless liquid source: wikipedia, accessed: 2019-09-27

Products:

  • 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
  • I2O5 – Diiodine pentoxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Other names: Iodine pentoxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Iodine(V) oxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Iodic anhydride source: wikipedia, accessed: 2019-09-27, O2IOIO2 source: wikidata, accessed: 2019-09-02
    • Appearance: White crystalline solid | hygroscopic source: wikipedia, accessed: 2019-09-27