2 SCN- + 7 I2 + 8 H2O → 2 SO42- + 14 (I)- + 16 H+ + (CN)2

This is an oxidation-reduction (redox) reaction:

2 S-II - 16 e- → 2 SVI (oxidation)

2 CIV + 4 e- → 2 CII (reduction)

14 I0 + 14 e- → 14 I-I (reduction)

SCN- is a reducing agent, SCN- is an oxidizing agent, I2 is an oxidizing agent.

Reactants:

  • SCN- – Cyanosulfanide source: wikipedia, accessed: 2019-09-28source: wikidata, accessed: 2019-09-02
    • Other names: Thiocyanate source: wikipedia, accessed: 2019-09-28source: wikidata, accessed: 2019-09-02, R source: wikipedia, accessed: 2019-09-28, Hodanide | Sulfocyanate| Sulphocyanate| Thiocyanide}} source: wikipedia, accessed: 2019-09-28
  • 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
  • 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

Products:

  • SO42- – Sulfate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-07
    • Other names: Sulfate ion source: wikidata, accessed: 2019-09-07, Sulphate ion source: wikidata, accessed: 2019-09-07, Sulphate source: wikidata, accessed: 2019-09-07
  • I-
  • H+
  • (CN)2 – Oxalonitrile source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02
    • Other names: Cyanogen source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Ethanedinitrile source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Dicyan source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: NIOSH NPG, accessed: 2019-09-02
    • Appearance: Colourless gas source: wikipedia, accessed: 2019-09-27; Colourless gas or compressed liquefied gas with characteristic odour source: ICSC, accessed: 2019-09-04; Colorless gas with a pungent, almond-like odor. [Note: Shipped as a liquefied compressed gas. Forms cyanide in the body.] source: NIOSH NPG, accessed: 2019-09-02