Which of the following will be formed when K4[Fe(CN)6] solution is added to FeCl3 solution?
Answer & explanation
Correct answer: option 3
When the solution containing ferric chloride is treated with potassium ferrocyanide solution a blue precipitate/colouration is obtained. The colour of the precipitate is Prussian blue. It is ferric ferro-cyanide.
4FeCl3+3K4[Fe(CN)6] ⟶ Fe4[Fe(CN)6]3+12KCl