Chemical elements
  Silver
    Isotopes
    Energy
    Production
    Application
    Physical Properties
    Chemical Properties
      Silver fluoride
      Silver subfluoride
      Silver chloride
      Silver subchloride
      Photohalides
      Silver bromide
      Silver oxybromide
      Silver subbromide
      Silver iodide
      Silver hypochlorite
      Silver chlorite
      Silver chlorate
      Silver perchlorate
      Silver bromate
      Silver perbromate
      Silver iodate
      Silver periodates
      Silver suboxide
      Silver monoxide
      Higher oxides
      Silver subsulphide
      Silver sulphide
      Silver sulphite
      Silver sulphate
      Silver selenide
      Silver telluride
      Silver thiosulphate
      Silver dithionate
      Silver azide
      Silver hyponitrite
      Silver nitrite
      Silver nitrate
      Silver phosphides
      Silver hypophosphate
      Silver orthophosphate
      Silver pyrophosphate
      Silver metaphosphate
      Silver arsenite
      Silver arsenate
      Silver carbide
      Silver carbonate
      Silver cyanide
      Silver thiocyanate
      Silver borate
    PDB 1aoo-3kso

Silver sulphate, Ag2SO4






The Silver sulphate, Ag2SO4 is produced by dissolving the metal in sulphuric acid, and by the action of this acid on the nitrate. It forms white, rhombic crystals, isomorphous with those of the corresponding sodium salt, and melting at low red heat. Its density is 5.45. The solubility of silver sulphate in water at various temperatures has been only partially investigated. At 14.5° C., 100 grams of saturated solution contain 0.730 gram of silver sulphate; at 25° C. the solubility is 0.0267 gram-molecule per litre of water. Its heat of formation from the metal, oxygen, and sulphur dioxide is 96.20 Cal.

When the sulphate is heated to fusion in a current of hydrogen chloride, it is converted completely into chloride:

Ag2SO4 + 2HCl = 2AgCl + H2SO4. Heating with Silver sulphide causes partial reduction to metallic silver: Ag2SO4 + Ag2S = 4Ag + 2SO2.

From the solution in dilute sulphuric acid three acid salts have been obtained: AgHSO4, pale yellow prisms; 2Ag2O,5SO3,5H2O, lustrous laminae; and Ag2O,4SO3,5H2O, colourless prisms. The saturated solution in ammonium hydroxide yields tetragonal crystals of the formula Ag2SO4,4NH3. The dry sulphate absorbs ammonia, forming a compound Ag2SO4,2NH3.


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