Atomistry » Chromium » Compounds » Ammonium Chromous Carbonate
Atomistry »
  Chromium »
    Compounds »
      Ammonium Chromous Carbonate »

Ammonium Chromous Carbonate, (NH4)2CO3.CrCO3

Ammonium Chromous Carbonate, (NH4)2CO3.CrCO3.H2O, is deposited as a yellow crystalline powder when an ammoniacal solution of chromous acetate is acted upon, first by a current of carbon dioxide, and then by a stream of hydrogen. The salt is washed successively with dilute ammonia solution, alcohol, and finally ether, and then dried in a stream of hydrogen containing a little ammonia. It may also be prepared by boiling the ammoniacal solution of chromous acetate with a solution of sodium carbonate in an atmosphere of hydrogen. The salt is an energetic reducer. It gradually decomposes on exposure to air, giving blue chromic hydroxide; heated in the air or in hydrogen it yields green chromium sesquioxide. It is attacked by chlorine at red heat, giving chromic chloride; with hydrogen sulphide, the sulphide, Cr2S3, is obtained as a black crystalline powder. In absence of oxygen dilute mineral acids dissolve it, yielding blue solutions.

Last articles

Tb in 6TVY
Si in 6Y7O
Rh in 6WRM
Rh in 6WRL
Ni in 6Y8Z
Ni in 6Y8Y
Na in 6ZXZ
Na in 7ACG
Na in 6YLS
Na in 6Y8Z
© Copyright 2008-2020 by atomistry.com
Home   |    Site Map   |    Copyright   |    Contact us   |    Privacy