2 CuSO4 + 4 NaCN → 2 CuCN + (CN)2 + 2 Na2SO4

This is an oxidation-reduction (redox) reaction:

2 CII + 2 e- → 2 CI (reduction)

NaCN is an oxidizing agent.

Reactants:

  • CuSO4 – Copper(II) sulfate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Other names: Cupric sulphate source: wikipedia, accessed: 2019-09-27source: ICSC, accessed: 2019-09-04, Blue vitriol (pentahydrate) source: wikipedia, accessed: 2019-09-27, Bluestone (pentahydrate) source: wikipedia, accessed: 2019-09-27
    • Appearance: Gray-white (anhydrous) | blue (pentahydrate) source: wikipedia, accessed: 2019-09-27; White hygroscopic crystals source: ICSC, accessed: 2019-09-04
  • NaCN
    • Names: Sodium cyanide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Sodium cyanide (as CN) source: NIOSH NPG, accessed: 2019-09-02, Sodium salt of hydrocyanic acid source: wikidata, accessed: 2019-09-02source: NIOSH NPG, accessed: 2019-09-02, Hydrocyanic acid, sodium salt source: ICSC, accessed: 2019-09-04
    • Appearance: White solid source: wikipedia, accessed: 2019-09-27; White hygroscopic crystalline powder with characteristic odour. odourless when dry source: ICSC, accessed: 2019-09-04; White, granular or crystalline solid with a faint, almond-like odor. source: NIOSH NPG, accessed: 2019-09-02

Products:

  • CuCN – Copper(I) cyanide source: wikipedia, accessed: 2019-09-27
    • Other names: Cuprous cyanide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Copper cyanide source: wikipedia, accessed: 2019-09-27, Cupricin source: wikipedia, accessed: 2019-09-27
    • Appearance: Off-white / pale yellow powder source: wikipedia, accessed: 2019-09-27
  • (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
  • Na2SO4
    • Names: Sodium sulfate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Sodium sulphate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Sulfate of sodium source: wikipedia, accessed: 2019-09-27
    • Appearance: White crystalline solid | hygroscopic source: wikipedia, accessed: 2019-09-27; White hygroscopic solid in various forms source: ICSC, accessed: 2019-09-04