Question

What product is formed by mixing the solution of $K_4\left[Fe\right(CN{)}_6]$ with the solution of $FeC{l}_3$ :

• A. ferro-ferricyanide
• B. ferric-ferrocyanide
• C. ferri-ferricyanide
• D. Potassium ferricyanide

Answer 1

Answer: (B)

ferric-ferrocyanide

With potassium hexacyanoferrate (II) solution, $F{e}^{3+}$ gives an intense blue precipitate of iron (III) hexacyanoferrate (Prussian blue)

$4F{e}^{3+}+3\left[Fe\right(CN{)}_6{]}^{4-}\to \underset{Prussianblue}{F{e}_4\left[Fe\right(CN{)}_6{]}_3\downarrow }$

This is ferric-ferrocyanide.

Hence, the correct option is B.