Atomistry » Iron » Chemical Properties » Ferrous potassium ferrocyanide
Atomistry »
  Iron »
    Chemical Properties »
      Ferrous potassium ferrocyanide »

Ferrous potassium ferrocyanide, FeK2[Fe(CN)6]

Ferrous potassium ferrocyanide, FeK2[Fe(CN)6], is obtained as a white precipitate when potassium ferrocyanide reacts with an equi- molecular quantity of a ferrous salt: -

FeCl2 + K4[Fe(CN)6] = FeK2[Fe(CN)6] + 2KCl.

It readily absorbs oxygen, yielding Prussian blue.

Everitt's salt also has the formula FeK2[Fe(CN)6] and is isomeric with the previous salt. It is obtained when dilute sulphuric acid and potassium ferrocyanide are heated together: -

2K4[Fe(CN)6] + 3H2SO4 = 3K2SO4 + K2Fe[Fe(CN)6] + 6HCN.

It is a pale yellow crystalline powder which, upon oxidation with hydrogen peroxide, yields Williamson's violet.

Last articles

Fe in 2YXO
Fe in 2YRS
Fe in 2YXC
Fe in 2YNM
Fe in 2YVJ
Fe in 2YP1
Fe in 2YU2
Fe in 2YU1
Fe in 2YQB
Fe in 2YOO
© Copyright 2008-2020 by atomistry.com
Home   |    Site Map   |    Copyright   |    Contact us   |    Privacy