Atomistry » Cadmium » Chemical Properties
Atomistry »
  Cadmium »
    Chemical Properties »
      Cadmium Fluoride »
      Cadmium Chloride »
      Cadmium Bromide »
      Cadmium Iodide »
      Cadmium Chlorate »
      Cadmium Perchlorate »
      Cadmium Bromate »
      Cadmium Iodate »
      Cadmium Periodate »
      Cadmium Suboxide »
      Cadmium Oxide »
      Cadmium Hydroxide »
      Cadmic Hydroxide »
      Cadmium Peroxide »
      Cadmium Sulphide »
      Cadmium Sulphite »
      Cadmium Sulphate »
      Cadmium Thiosulphate »
      Cadmium Dithionate »
      Cadmium Selenide »
      Cadmium Selenites »
      Cadmium Selenate »
      Cadmium Telluride »
      Cadmium Tellurite »
      Cadmium Tellurate »
      Cadmium Chromite »
      Cadmium Chromate »
      Cadmium Dichromate »
      Cadmium Molybdate »
      Cadmium Tungstate »
      Cadmium Nitride »
      Cadmium Azide »
      Cadmium Amide »
      Cadmium Nitrite »
      Cadmium Nitrate »
      Cadmium Phosphide »
      Cadmium Hypophosphite »
      Cadmium Orthophosphate »
      Cadmium Pyrophosphate »
      Cadmium Thiophosphates »
      Cadmium Arsenide »
      Cadmium Arsenite »
      Cadmium Arsenates »
      Cadmium Metantimonate »
      Cadmium Carbonate »
      Cadmium Thiocarbonate »
      Cadmium Cyanide »
      Cadmium Silicate »
      Cadmium Borates »

Chemical Properties of Cadmium

Cadmium burns, when heated in air, to a brown oxide. It was said to retain its brilliancy at ordinary temperatures, but it tarnishes in ordinary air.

Cadmium volatilises before it acts on water, but it can be converted into oxide by heating a mixture of cadmium vapour and steam. The reaction


is, however, reversible. If the metal is immersed in water a layer of hydrated oxide forms upon it.

Cadmium behaves towards acids very similarly to zinc. The heat of solution in aqueous hydrochloric acid has been determined thus -

Cd+2HCl.200H2O = CdCl2.400H2O+H2 + 17.230 Cal.

at 20° C. if the hydrogen is dry. The corresponding figure for moist hydrogen is 16.980 Cal.

Heated cadmium reacts more readily than zinc with sulphur dioxide, and is converted into a mixture of cadmium sulphate and sulphide.

Cadmium sulphide is produced when sulphurous acid acts on the metal. Sulphur is precipitated in the presence of hydrochloric or sulphuric acid, and the complete action may be complex. According to Fordos and Gelis, cadmium sulphite and hydrogen are first produced. The nascent hydrogen reduces the excess of sulphurous acid to hydrogen sulphide. The latter then precipitates some of the cadmium sulphite as sulphide. They obtained cadmium sulphite and sulphide by treating cadmium with sulphurous acid. Schutzenberger obtained the same products. Cadmium sulphide is also produced when cadmium is heated with sulphurous acid at 200° C. in closed vessels.

Last articles

Zn in 7VD8
Zn in 7V1R
Zn in 7V1Q
Zn in 7VPF
Zn in 7T85
Zn in 7T5F
Zn in 7NF9
Zn in 7M4M
Zn in 7M4O
Zn in 7M4N
© Copyright 2008-2020 by
Home   |    Site Map   |    Copyright   |    Contact us   |    Privacy