AuCl3 + H2O2 + 4 NaOH → Na[Au(OH)6] + 3 NaCl

This is a complexation reaction: Na[Au(OH)6] is the formed complex.

This is an oxidation-reduction (redox) reaction:

AuIII - 2 e- → AuV (oxidation)

2 O-I + 2 e- → 2 O-II (reduction)

AuCl3 is a reducing agent, H2O2 is an oxidizing agent.

Reactants:

  • AuCl3 – Gold(III) trichloride source: wikipedia, accessed: 2019-09-27
    • Other names: Gold(III) chloride source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Auric chloride source: wikipedia, accessed: 2019-09-27, Gold trichloride source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Appearance: Red crystals (anhydrous); golden, yellow crystals (monohydrate) source: wikipedia, accessed: 2019-09-27
  • H2O2 – Hydrogen peroxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: NIOSH NPG, accessed: 2019-09-02
    • Other names: Dioxidane source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Oxidanyl source: wikipedia, accessed: 2019-09-27, Perhydroxic acid source: wikipedia, accessed: 2019-09-27
    • Appearance: Very light blue color; colorless in solution source: wikipedia, accessed: 2019-09-27; Colourless liquid source: ICSC, accessed: 2019-09-04; Colorless liquid with a slightly sharp odor. [Note: The pure compound is a crystalline solid below 12°F. Often used in an aqueous solution.] source: NIOSH NPG, accessed: 2019-09-02
  • NaOH
    • Names: Sodium hydroxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Caustic soda source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Lye source: wikidata, accessed: 2019-09-02
    • Appearance: White, waxy, opaque crystals source: wikipedia, accessed: 2019-09-27; White hygroscopic solid in various forms source: ICSC, accessed: 2019-09-04; Colorless to white, odorless solid (flakes, beads, granular form). source: NIOSH NPG, accessed: 2019-09-02

Products:

  • Na[Au(OH)6]
  • NaCl – Sodium chloride source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Other names: {{unbulleted list source: wikipedia, accessed: 2019-09-27, Salt source: wikidata, accessed: 2019-09-02, Table salt source: wikidata, accessed: 2019-09-02
    • Appearance: Colorless cubic crystals source: wikipedia, accessed: 2019-09-27