Atomistry » Chromium » Compounds » Ammonium Chromate
Atomistry »
  Chromium »
    Compounds »
      Ammonium Chromate »

Ammonium Chromate, (NH4)2CrO4

Ammonium Chromate, (NH4)2CrO4, is formed when a solution of chromic acid is neutralised by ammonia, and the mixture evaporated. It yields golden-yellow needles (monoclinic prisms):

a:b:c = 1.9603:1:1.2226; β = 115° 13',

of density 1.886, and soluble in water. On heating or on exposure to air they decompose, evolving ammonia, and form the dichromate:

2(NH4)2CrO4 = (NH4)2Cr2O7 + 2NH3 + H2O;

consequently the chromate cannot be dried at 100° C. without undergoing decomposition.

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
Home   |    Site Map   |    Copyright   |    Contact us   |    Privacy