Ferric oxalate

Chemical Designations - Synonyms Ammonium ferric oxalate trihydrate, ammonium trioxalatoferrate trihydrate Chemical Formula Fe(NH4)3(C204)3 3H20. 

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

Examples of the components of the gelling composition are a water-soluble polymer such as polyacrylamide, an iron compound such as ferric acetyl-acetonate or ammonium ferric oxalate, and a ketone such as 2,4-pentanedione [1247]. The composition forms a temporary gel that is useful for the temporary plugging of a formation. The temporary gels that are formed will disappear after 6 months. 

Figure 6.27 Square-wave voltanunogram obtained for the electro-reduction of a ferric oxalate complex (5 x 10 mol dm ) in aqueous oxalate buffer r = 33.3 ms, sw = 30 mV and A = 5 mV. Reprinted with permission from Turner, J. A., Christie, J. H., Vukovic, M. and Osteryoung, R. A., Anal. Chem., 49, 1899-1903 (1977). Copyright (1977) American Chemical Society.

Solaqua is a patented, ex situ process for the removal of organic contaminants from wastewater or groundwater. The technology uses ferric oxalate and hydrogen peroxide in the presence of light to produce hydroxyl radicals, which destroy organic contaminants such as aromatic hydrocarbons, phenols, alkanes, aUcynes, ethers, and ketones. Solaqua is not yet commercially available. 

Synonym Ammonia Water Amfbnioformaldehyde Ammonium Acetate Ammonium Acid Fluoride Ammonium Amidosulfonate Ammonium Amidosulphate Ammonium Benzoate Ammonium Bicarbonate Ammonium Bichromate Ammonium Bifluoride Ammonium Carbonate Ammonium Chloride Ammonium Citrate Ammonium Citrate, Dibasic Ammonium Decaborate Octahydrate Ammonium Dichromate Ammonium Disulfate-Nickelate (II) Ammonium Ferric Citrate Ammonium Ferric Oxalate Trihydrate Ammonium Ferrous Sulfate Ammonium Fluoride Ammonium Fluosilicate Ammonium Formate Ammonium Gluconate Ammonium Hydrogen Carbonate Ammonium Hydrogen Fluoride Ammonium Hydrogen Sulfide Solution Ammonium Hydroxide Ammonium Hypo Ammonium Hyposulfite Ammonium Iodide Ammonium Iron Sulfate Ammonium Lactate Ammonium Lactate Syrup Ammonium Lauryl Sulfate Ammonium Molybdate Ammonium Muriate Ammonium Nickel Sulfate Ammonium Nitrate Ammonium Nitrate-Urea Solution Ammonium Oleate... 

Ammonium ferric oxalate (3H2O) [13268-42-3] M 428.1. Crystd from hot water (0.5ml/g). 

Fe2(C204)3 (aq.). The data of Lemoine1 on the heat of mixing aqueous ferric chloride with aqueous oxalic acid, and of aqueous ferric oxalate with aqueous hydrochloric acid, yield, for Fe2(C2O4)3(100), <2/=610.4. Data on the heat of dilution of aqueous ferric oxalate were reported by Lemoine.1... 

Oxalic acid, 7.8 g Ferric chloride, 1.0 g Ferric oxalate, 1.0 g Water to make 285.0ml... 

Follow this procedure Add 3 tablespoonfuls of ferric oxalate to 3 cups of water in one of the shallow pans. Dip the sheets of white paper, a few at a time, into the ferric oxalate solution and allow it to dry in a dark place. Ferric oxalate is the chemical for treating the white paper and turning it into blueprint paper. If you are not going to use the blueprint paper immediately, store it in the black envelope when it is dry. 

Results The ferric oxalate solution was colorless. When it coated the white paper, the white paper didn t change color. Nevertheless, the white paper became blueprint paper simply because it was coated with ferric oxalate. ... 

You can tell from the equation that the big change was in the placement of the iron (Fe) atoms. In the ferric oxalate, there were two iron atoms in each molecule. However, in the new compound, called ferrous oxalate, there was only one iron atom in each molecule. 

Similarly a ferric salt of an organic acid is reduced by sunlight, ferric oxalate being a well-known example.1... 

It is interesting to note that ferric salts of organic acids such as citric, tartaric, etc., are not as a rule ferric salts in the ordinary acceptation of the term. The iron has entered into the electro-negative radicle in an analogous manner to copper in the organic copper derivatives.4 In ferric oxalate and in the ferricyanides, which latter do not contain hydroxylic or carboxylic groups, the iron is similarly in the negative radicle. 

C6H140 3-methyl-3-pentanol 77-74-7 23.60 1.0115 2 9348 C6H18FeN3015 ammonium ferric oxalate trihydrate 13268-42-3 17.00 1.7800 1... 

Chatelier s principle). For example, ferric ions (Fe " ") form complexes with oxalate (C20 , abbreviated Ox ) with formulas (FeOx)" , (FeOx2), and (FeOx3)- . Oxalate can protonate to form HOx and H2OX. In basic solution, where most of the oxalate is present as Ox before complexation with Fe, the ferric/oxalate complexes are very stable. Adding acid, however, protonates the oxalate ion, which in turn causes dissociation of the ferric complexes. 

In 1937, Robin Hill succeeded in isolating chloroplasts from leaves which under suitable conditions still retained some form of photosynthetic activity. The material isolated by Hill actually consisted of thylakoid membranes which lacked the necessary enzymes for CO2 fixation as a result of the loss of the outer membrane envelope. When these chloroplasts were illuminated, no oxygen evolution could be observed. However, when an electron acceptor such as ferric oxalate, as was used by Hill initially, was added, oxygen evolution was observed upon illumination, accompanied by the reduction of the ferric oxalate to the ferrous form. Lurthermore, four equivalents of the oxidant were found to be photochemi-cally reduced for each mole of oxygen evolved. This reaction was called the Hill reaction. Later, ferricyanide and benzoquinone were commonly used as the oxidizing agents. 

At this juncture, van Niel s concept of a redox reaction taking place in the reaction center became very useful for understanding the Hill reaction. Although CO2 was not assimilated under illumination, it appeared that the other reactions responsible for the splitting of water were still active. The ferric oxalate used by Hill apparently served as a substitute for the natural oxidant CO2 to intercept electrons produced at the reaction center and thus allow oxygen to be evolved. The Hill reaction shows that CO2 assimilation and oxygen evolution are not obligatorily linked and two physically distinct enzymatic systems may exist. 

When sodium ammonium ferric oxalate, Na3(NH4)3Fe2(C204)e, 7H2O, and sodium ammonium aluminium oxalate,... 

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