The Electrolytic Preparation of Potassium Ferricyanide

O. W. Brown, C. O. Henke, I. L. Miller
1919 The Journal of Physical Chemistry  
The electrolytic oxidation of potassium ferrocyanide to potassium ferricyanide has been investigated by several men, including Hayek,l Brochet and Petit,2 and G r~b e .~ The results obtained by these men, as reported in the literature] seem to be somewhat at variance. All of them used a cell with a diaphragm, the oxidation being effected in the anode chamber. In each case the electrolyte in the anode chamber was agitated with a mechanical stirrer. Brochet and Petit state that the oxidation of
more » ... tassium ferrocyanide to potassium ferricyanide takes place according t o the following reaction: S K~F~( C N )~ + Fe(CN)P' = 4K3Fe(CN)G. Near the end, when the solution is poor in ferrocyanide, oxygen is evolved. To account for this reaction, Brochet and Petit give the equation Fe(CN)GIV + 2 H 2 0 = HdFe(CN)e + 0 2 .
doi:10.1021/j150201a005 fatcat:exsfmnc4pvcr5imkqnhj64e2bm