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Atomistry » Cobalt » Compounds » Ammonium Cobalti-cyanide | ||
Atomistry » Cobalt » Compounds » Ammonium Cobalti-cyanide » |
Ammonium Cobalti-cyanide, (NH4)3Co(CN)6
Ammonium Cobalti-cyanide, (NH4)3Co(CN)6.H2O, results on neutralising the free acid with ammonia. A more convenient method consists in decomposing the barium salt with ammonium sulphate solution. On filtering off the insoluble barium sulphate and concentrating the liquor, ammonium cobalti-cyanide crystallises out.3 It crystallises in colourless, transparent tablets, which readily dissolve in water, but are less soluble in alcohol. At 225° C. decomposition sets in, ammonium cyanide and carbonate being evolved, leaving a blue residue. The molecule of water cannot be expelled from the salt without simultaneous decomposition.
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