Acidic ferric chloride solution on treatment with excess of potassium ferrocyanide gives a Prussian blue coloured colloidal species. It is:

Question

Acidic ferric chloride solution on treatment with excess of potassium ferrocyanide gives a Prussian blue coloured colloidal species. It is:, HFe Fe ( CN ) 6, K 5 Fe Fe ( CN ) 6 2, Fe 4 Fe ( CN ) 6 3, KFe Fe ( CN ) 6

MARKS App · Accepted Answer

If we add ferric chloride over potassium ferrocyanide, it forms a white precipitate that will become blue. The reaction is FeCl 3 + K 4 Fe ( CN ) 6 ⟶ KFe Fe ( CN ) 6 + 3 KCl Being small quantity of ferric chloride, not all potassium is displaced.

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