Potassium ferrocyanide

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glebyych
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Potassium ferrocyanide

Post by glebyych »

Hello, I have a trouble finding any information about the K4[fe(cn)6] and k3[fe(cn)6] synthesis. Could anyone share the information about how these compounds are made
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ChenBeier
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Post by ChenBeier »

The old method was to cook meat, blood, iron parts and pot ash together.
Today Calciumhydroxide, hydrogen cyanide and iron chloride react each other to Calciumhexacyanidoferrat. This will react with potassium carbonate.
The yellow one will be slightly oxidized to get them red one.

https://en.m.wikipedia.org/wiki/Potassi ... #Synthesis

https://en.m.wikipedia.org/wiki/Potassium_ferricyanide
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