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

Higher oxides of silver






Electrolysis of Silver nitrate solution at 0° C. yields at the anode a black, crystalline substance of metallic lustre. It readily loses oxygen, Silver nitrate entering into solution, and the residual crystals of silver peroxynitrate have the formula 2Ag3O4,AgNO3. It changes slowly, with evolution of oxygen, into 3Ag2O,AgNO3. According to Weber, the presence of between 15 and 25 per cent, of nitric acid inhibits the deposition of the peroxynitrate at the anode, but produces a brown solution. Weber regards the oxide portion of the salt as having the formula Ag(AgO2)2, analogous to that of magnetic iron oxide, and considers it to be the silver salt of an unstable argentic acid, HAgO2. It is a compound of silver in which the metal has a valency greater than unity.

An analogous derivative of the oxide Ag3O4 has been prepared by the electrolysis of silver fluoride. It has the formula 2Ag3O4,AgF.

A peroxide, probably Ag2O3, is stated to be produced by anodic oxidation of silver in acid solution. When solutions of sodium or potassium persulphate react with silver or Silver nitrate, a peroxide with a higher percentage of oxygen than Ag2O2 is produced, the process being attended by catalytic decomposition of the persulphate with formation of the acid sulphate. Ammonium persulphate does not yield a peroxide, but the ammonium radical becomes oxidized to nitric acid.


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