What happens when ferric chloride is added to potassium ferrocyanide
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If we add ferric chloride over potassium ferrocyanide, it forms a white precipitate that will become blue. The reaction is : FeCl3 + K4[Fe(CN)6] → KFe[Fe(CN)6] + 3 KCl and this is normal, because being small quantity of ferric chloride, not all potassium is displaced.
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Answer:
Dark blue precipitate called Prussian blue is formed
Explanation:
Ferric chloride on reaction with potassium ferrocyanide gives potassium diiron(III) hexacyanoferrate which is dark blue precipitate called Prussian blue and potassium chloride.
The reaction is shown below:
This test is a qualitative method for the detection of the ions.
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