Potassium ferric oxalate

Twenty-five grams of ferric sulfate, 50 g. of barium oxalate (which may be prepared from 50 g. of BaCl2 2H20 and 29.3 g. of Na2C204), and 27.3 g. of potassium oxalate monohydrate are placed in 600 ml. of water and digested for several hours on the steam bath. After filtering with suction and washing the precipitate, the filtrate is evapo-... 

K3[Fe (C204)3] x3 H2O) can be prepared by mixing solutions of ferric chloride (FeCla) and potassium oxalate (K2C2O4) and by subsequent recrystallization of the light sensitive reaction product (Braun et al., 1991). For comparison, the UV/VIS absorbance spectra of Fe aquo and hydroxo complexes ([Fe(H20)6], [Fe(0H)(H20)s] and [Fe(0H)2(H20)4] ) and the dependence of their individual concentrations in aqueous solution on pH have been published by Safarzadeh-Amiri et al. (1996). 

The heat of coagulation of colloidal ferric hydroxide with potassium oxalate has been studied by Doerinckel.7... 

Pure potassium ferrioxaiate is prepared by mixing three volumes of 1.5 m potassium oxalate with one volume of 1.5 m ferric chloride, both of analytical quality. The precipitated green potassium ferrioxaiate [K3Fe(C204)3-3H20] should be recrystallized three times from warm water and the crystals dried in a current of warm air (45 °C). The whole procedure must be carried out in a darkroom lit with a red safelight. The crystals can be stored indefinitely in the dark. 

Aluminum citrate Chromium sulfate Ferrochromo-lignosulfonate Manganese nitrate Potassium hichromate Sodium bichromate Ferric acetylacetonate Ammonium ferric oxalate... 

Ferric ammonium citrate, green, 4.0 g Oxalic acid, crystals, 4.0 g Potassium ferricyanide, 4.0 g Water to make 1.0 liter... 

Color reactions Boric acid (hydroxyquinones). Dimethylaminobenzaldehyde (pyrroles). Ferric chloride (enols, phenols). Haloform test. Phenylhydrazine (Porter-Silber reaction). Sulfoacetic acid (Liebermann-Burchard test). Tetranitromethane (unsaturation). Condensation catalysts /3-Alanine. Ammonium acetate (formate). Ammonium nitrate. Benzyltrimethylammonium chloride. Boric acid. Boron trilluoride. Calcium hydride. Cesium fluoride. Glycine. Ion-exchange resins. Lead oxide. Lithium amide. Mercuric cyanide. 3-Methyl-l-ethyl-2-phosphoiene-l-oxlde. 3-Methyl-1-phenyi-3-phoipholene-1-oxide. Oxalic acid. Perchloric acid. Piperidine. Potaiaium r-butoxIde. Potassium fluoride. Potassium... 

Perrlo Terrocyaiiide—Pruman blue—(Fe,), eC,NJ, + 18 Aq— 859.3 + 324—is a dark blue precipitate, formed when potassium feirocy-anide is added to a ferric salt It is insoluble in H.O, cohol and dilute acids soluble in oxalic acid solution (blue ink). Alkalies turn it brown. 

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