Chemical elements
  Gold
    Isotopes
    Energy
    Production
    Extraction
    Application
    Physical Properties
    Chemical Properties
      Aurous fluoride
      Aurous chloride
      Aurous bromide
      Aurous iodide
      Aurous oxide
      Aurous sulphide
      Aurous thiosulphate
      Aurous Derivatives of Nitrogen
      Aurous cyanide
      Potassium aurothiocyanate
      Ammonia and Aurous Halides
      Gold dichloride
      Gold dibromide
      Gold monoxide
      Gold monosulphide
      Gold monosulphate
      Nitride of Bivalent Gold
      Auric chloride
      Aurichloric Acid
      Auric bromide
      Auribromic Acid
      Auric iodide
      Auri-iodic Acid
      Auric iodate
      Auric hydroxide
      Auric sulphide
      Auric sulphate
      Acid auryl sulphate
      Auric selenide
      Auric selenate
      Auric telluride
      Gold and Nitrogen
      Auric nitrates
      Gold and Phosphorus
      Gold arsenides
      Auric selenide
      Auric antimonide
      Auric cyanide
      Salts of Auricyanic Acid
      Double Salts of Auric thiocyanate
      Gold carbide
      Gold and Silicon
    PDB 1a52-4acl

Chemical Properties of Gold






The chemical character of the metal accords with its low electroaffinity, an example being its stability towards the action of strong acids; although boiling, concentrated nitric acid dissolves it to a slight extent. It is also dissolved by selenic acid. The metal is readily brought into solution by the action of powerful oxidizers such as chlorine, and by mixtures in which chlorine is generated. Such mixtures are formed by hydrochloric acid with peroxides, chromic acid, permanganate, or nitric acid, and by hypochlorites with sulphuric acid. Other oxidizing mixtures have a similar effect, examples being solid potassium permanganate and sulphuric acid; the higher oxides and peroxides of manganese with concentrated sulphuric acid, arsenic acid, or phosphoric acid; those of lead, nickel, and chromium with concentrated sulphuric acid or phosphoric acid; and concentrated nitric acid with sulphuric acid. At 160° C. gold is attacked by sulphuryl chloride, SO2Cl2, with formation of auric chloride and evolution of sulphur dioxide. It is also attacked by pyrosulphuryl chloride, S2O5Cl2. Aqua regia converts it into aurichloric acid, with evolution of nitric oxide:

Au+HNO3+4HCl = HAuCl4+NO+2H2O.

The metal does not combine directly with oxygen.

Normally, gold does not display radioactivity, neither the metal nor its salts affecting the photographic plate. Cobb states that after exposure to a high-tension discharge between platinum electrodes amorphous gold does not affect a photographic plate, and further alleges that traces of copper are produced in the metal.


Compounds of Gold

Aurous CompoundsCompounds of Bivalent GoldAuric Compounds
Aurous fluoride, AuF
Aurous chloride, AuCl
Aurous bromide, AuBr
Aurous iodide, AuI
Aurous oxide Au2O
Aurous sulphide, Au2S
Aurous thiosulphate, Au2S2O3,3H2S2O3,H2O
Aurous Derivatives of Nitrogen
Aurous cyanide, AuCN
Potassium aurothiocyanate, KAu(CNS)2
Complex Derivatives of Ammonia and Aurous Halides
Gold dichloride, AuCl2
Gold dibromide, AuBr2
Gold monoxide, AuO
Gold monosulphide, AuS
Gold monosulphate, AuSO4
Nitride of Bivalent Gold
Gold carbide, Au2C2
Auric chloride, AuCl3
Aurichloric Acid, HAuCl4
Sodium aurichloride, NaAuCl4,2H2O
Potassium aurichloride, KAuCl4
Ammonium aurichlorides
Auric bromide, AuBr3
Potassium auribromide, KAuBr4
Ammonium auribromide, NH4AuBr4
Auric iodide, AuI3
Auri-iodic Acid, HAuI4
Auric iodate
Auric hydroxide, AuOOH
Auric sulphide, Au2S3
Auric sulphate, Au2(SO4)3
Acid auryl sulphate, AuOHSO4
Auric selenide
Auric selenate, Au2(SeO4)3
Auric telluride, Au2Te4
Derivatives of Gold and Nitrogen
Auric nitrates
Compounds of Gold and Phosphorus
Gold phosphides
Gold arsenides
Auric antimonide, AuSb
Auric cyanide, Au(CN)3
Salts of Auricyanic Acid
Double Salts of Auric thiocyanate
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