4 HCN (aq) + 5 O2 (g) → 2 N2 (g) + 4 CO2 (g) + 2 H2O (l)

This is an oxidation-reduction (redox) reaction:

4 CII - 8 e- → 4 CIV (oxidation)

4 N-III - 12 e- → 4 N0 (oxidation)

10 O0 + 20 e- → 10 O-II (reduction)

HCN is a reducing agent, HCN is a reducing agent, O2 is an oxidizing agent.

Reactants:

  • HCN – F source: wikipedia, accessed: 2019-09-27, Ormonitrile (substitutive)|Hydridonitridocarbon (additive)}} source: wikipedia, accessed: 2019-09-27
    • Other names: Hydrogen cyanide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: NIOSH NPG, accessed: 2019-09-02, Ormic anammonide|Hydrocyanic acid|Prussic acid|Methanenitrile source: wikipedia, accessed: 2019-09-27, Hydrogen cyanide, liquefied source: ICSC, accessed: 2019-09-04
    • Appearance: Colorless liquid or gas source: wikipedia, accessed: 2019-09-27; Colourless gas or liquid with characteristic odour source: ICSC, accessed: 2019-09-04; Colorless or pale-blue liquid or gas (above 78°F) with a bitter, almond-like odor. [Note: Often used as a 96% solution in water.] source: NIOSH NPG, accessed: 2019-09-02
  • O2
    • Names: Dioxygen source: wikidata, accessed: 2019-09-07, Oxygen source: ICSC, accessed: 2019-09-04source: wikidata, accessed: 2019-09-07, Oxygen (liquefied) source: ICSC, accessed: 2019-09-04
    • Appearance: Odourless compressed gas source: ICSC, accessed: 2019-09-04; Liquefied gas. colourless-to-blue extremely cold liquid source: ICSC, accessed: 2019-09-04

Products:

  • N2
    • Names: Dinitrogen source: wikidata, accessed: 2019-09-07, Nitrogen (compressed gas) source: ICSC, accessed: 2019-09-04, Nitrogen (liquified) source: ICSC, accessed: 2019-09-04
    • Appearance: Odourless colourless compressed gas source: ICSC, accessed: 2019-09-04; Odourless colourless extremely cold liquid source: ICSC, accessed: 2019-09-04
  • CO2
    • Names: Carbon dioxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, {{plainlist| source: wikipedia, accessed: 2019-09-27, CO2 source: wikidata, accessed: 2019-09-02
    • Appearance: Colorless gas source: wikipedia, accessed: 2019-09-27; Odourless colourless compressed liquefied gas source: ICSC, accessed: 2019-09-04; Colorless, odorless gas. [Note: Shipped as a liquefied compressed gas. Solid form is utilized as dry ice.] 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