video tutorial Convert potassium ferricyanide into ferrocyanide

Name: video tutorial - Convert potassium ferricyanide into ferrocyanide
Uploaded: 2025-12-11T09:03:44.248Z
Duration: 7 min 24 s
Description: The former contains iron in the plus two oxidation state and the latter in the plus three oxidation state....the first thing we're going to do is show you how to convert it back to the ferrocyanide in a nice clean way.

A chemistry video discusses the confusion between potassium ferrocyanide (Fe2+) and potassium ferricyanide (Fe3+) and highlights the importance of the iron oxidation state.
It demonstrates converting ferricyanide back to ferrocyanide by treating a ferricyanide-containing material with potassium hydroxide and a reducing agent, then crystallizing potassium ferrocyanide.
Observations during the process include color changes of the solution and gas evolution; the solution becomes neutral and ferrocyanide crystallizes as yellow crystals that dry to a pale yellow solid.
The process yields potassium ferrocyanide in solution, and proper stoichiometry of potassium hydroxide is important to ensure complete conversion; a slight excess of base may be needed if the final color remains orange.
Potassium ferrocyanide is noted as a useful source of alkali cyanides, with a reference to a related video for details.
The video explains why the reaction is not performed directly with ferricyanide and sodium metal (danger, vigorous reaction, impurities) and emphasizes safety in cyanide chemistry.