Here's the simplified reaction:
3 K₄[Fe(CN)₆] + 4 FeCl₃ → Fe₄[Fe(CN)₆]₃ + 12 KCl
Explanation:
* Potassium ferrocyanide (K₄[Fe(CN)₆]) contains the ferrocyanide ion [Fe(CN)₆]⁴⁻, which has iron in the +2 oxidation state.
* Ferric ammonium (FeCl₃) contains the ferric ion Fe³⁺.
* The reaction involves a redox reaction where iron in the +2 state (ferrocyanide) is oxidized to +3 state (Prussian blue), while iron in the +3 state (ferric ammonium) is reduced to +2 state (Prussian blue).
* The result is the formation of Prussian blue, a complex compound with a deep blue color, along with potassium chloride (KCl) as a byproduct.
Prussian blue has been used for centuries as a pigment in paints, inks, and dyes. It's also used in some industrial processes and for its ability to absorb radioactive cesium.
