Ferrous hydrogen carbonate

Carbonic acid acts on iron, yielding ferrous carbonate or soluble ferrous hydrogen carbonate, and evolving hydrogen,... 

Ferrous hydrogen carbonate or ferrous bicarbonate, FeH2(C03)2, exists in solutions obtained by dissolving ferrous oxide or carbonate in water charged with excess of carbon dioxide. On exposure to air carbon dioxide is evolved, and a precipitate is obtained consisting essentially of ferric hydroxide.2... 

Just (Ber., 1907, 40, 3695) has studied the kinetics of the autoxidations of ferrous hydrogen carbonate in water. 

FIGURE 2.13 (a) X-ray scattering factors for hydrogen, carbon, chloride and ferrous ions (b) the neutron scattering cross sections for several elements, as a function of sinOA. 

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... 

A mixed solution of ferrous sulphate and hydrogen carbonate deposits ferric hydroxide upon standing, even m the dark.2 Its heat of formation is... 

Microscopic crystals of ferrous carbonate have been obtained by precipitating the salt from a ferrous solution with sodium hydrogen carbonate, and heating the mixture in closed tubes for twelve to thirty-six hours at 150° C. 

Furthermore, a bacterium has been found that oxidizes ferrous compounds to ferric hydroxide with nitrate and produces nitrite, hydrogen carbonate ion, and proton [reaction (5.13)]. The bacterium is called Ferroglobus placidus, an archaeon growing at 65-95°C (Hafenbradl et al., 1996). This bacterium thus produces ferric hydroxide without molecular oxygen or light. 

The technical production and metallurgy of iron will not be discussed here.2 Chemically pure iron can be prepared by reduction of pure iron oxide (which is obtained by thermal decomposition of ferrous oxalate, carbonate or nitrate) with hydrogen, by electrodeposition from aqueous solutions of iron salts, or by thermal decomposition of iron carbonyl. 

The group of microorganisms known as autotrophic bacteria obtain energy from the oxidation of a variety of inorganic compounds (ammonia, nitrite, sulfide, ferrous iron, hydrogen, carbon monoxide, sulfur, thiosulfate).The free energy changes and over-all efficiencies of a number of these processes have been calculated. We may take as an example the oxidation of nitrite to nitrate performed by Nitrobacter... 

Acidic Properties. As a typical acid, it reacts readily with alkaUes, basic oxides, and carbonates to form salts. The largest iadustrial appHcation of nitric acid is the reaction with ammonia to produce ammonium nitrate. However, because of its oxidising nature, nitric acid does not always behave as a typical acid. Bases having metallic radicals ia a reduced state (eg, ferrous and staimous hydroxide becoming ferric and stannic salts) are oxidized by nitric acid. Except for magnesium and manganese ia very dilute acid, nitric acid does not Hberate hydrogen upon reaction with metals. 

Finally, the carbonate ion combines with ferrous ion to form ferrous carbonate and hydrogen is evolved ... 

Foulis-Holmes A process for removing hydrogen cyanide from coal gas by scrubbing with a suspension of freshly precipitated ferrous carbonate. Invented by W. Foulis and P. Holmes in England in the 1890s. 

Contaminated soil from a manufactured coal gas plant that had been exposed to crude oil was spiked with acenaphthene (400 mg/kg soil) to which Fenton s reagent (5 mL 2.8 M hydrogen peroxide 5 mL 0.1 M ferrous sulfate) was added. The treated and nontreated soil samples were incubated at 20 °C for 56 d. Fenton s reagent did not promote the mineralization of acenaphthene by indigenous microorganisms to any appreciable extent. The mineralization of acenaphthene was enhanced only 1.2-fold when compared with the nontreated control sample. The amounts of acenaphthene recovered as carbon dioxide after treatment with and without Fenton s reagent were 20 and 17%, respectively (Martens and Frankenberger, 1995). 

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