Iron sulfates

C. Further warming to 65°C forms white iron sulfate monohydrate [17375-41 -6], FeSO H2O, which is stable to 300°C. Strong beating results in decomposition with loss of sulfur dioxide. Solutions of iron(II) sulfate reduce nitrate and nitrite to nitric oxide, whereupon the highly colored [Fe(H20) (N0)] ion is formed. This reaction is the basis of the brown ring text for the quaUtative deterrnination of nitrate or nitrite. 

Plants can also be pests that need to be controlled, particulady noxious weeds infesting food crops. Prior to 1900, inorganic compounds such as sulfuric acid, copper nitrate, sodium nitrate, ammonium sulfate, and potassium salts were used to selectively control mustards and other broadleaved weeds in cereal grains. By the early 1900s, Kainite and calcium cyanamid were also used in monocotyledenous crops, as well as iron sulfate, copper sulfate, and sodium arsenate. Prom 1915 to 1925, acid arsenical sprays, carbon bisulfate, sodium chlorate, and others were introduced for weed control use. Total or nonselective herbicides kill all vegetation, whereas selective compounds control weeds without adversely affecting the growth of the crop (see Herbicides). 

The cake produced by the digestion is extracted with cold water and possibly with some diluted acids from the subsequent processes. During the cake dissolution it is necessary to maintain the temperature close to 65°C, the temperature of iron sulfate maximum solubiUty. To prevent the reoxidation of the Fe " ions during processing, a small amount of Ti " is prepared in the system by the Ti reduction. The titanium extract, a solution of titanium oxo-sulfate, iron sulfate, and sulfuric acid, is filtered off. Coagulation agents are usually added to the extract to faciUtate the separation of insoluble sludge. 

The main impurity of the filtrate is the iron(II) sulfate which can be crystallized as the heptahydrate, FeS04-7H2 O, by cooling the solution to a temperature below 15°C. This process is most often carried out in vacuum crystallizers. The crystals of iron sulfate are separated by centrifugation or filtration (qv). To prevent premature hydrolysis of titanium dioxide, the temperature of the above processes should not exceed 70°C. 

Synthetic Iron Oxides. Iron oxide pigments have been prepared synthetically since the end of the seventeenth century. The first synthetic red iron oxide was obtained as a by-product of the production of sulfuric acid from iron sulfate containing slate. Later, iron oxide pigments were produced direcdy by the thermal decomposition of iron sulfates. In the 1990s, about 70% of all iron oxide pigments consumed are prepared synthetically. 

If the product is to be used in the manufacture of nitrous oxide, an anesthetic gas, a purity of not less than 99.5% is required. The salt must be almost completely free of contaminating organic matter, iron, sulfate, and chloride. 

The resultant slag, a complex mixture of titanates, may contain 70—85% Ti02- The slag route is particularly useful when ilmenite is closely associated with haematite, from which it cannot economically be separated mechanically. Because the iron content of the slag is low, its use reduces the quantity of iron sulfate in the Hquid effluent of sulfate process plants. Slag used as a feedstock for TiCl production must be low in magnesium and calcium. A variety of other ilmenite beneficiation or synthetic mtile processes have been pursued, primarily to provide alternative chloride process feedstocks. Low grade ilmenite... 

A number of products are being marketed under the trade name POLYON. These include coated basic fertilizer materials, ie, urea, potassium nitrate, potassium sulfate, potassium chloride, ammonium sulfate, ammonium phosphate, and iron sulfate, in various particle sizes. Coatings weights on urea vary from 1.5 to 15%, depending on the release duration desired. Table 6 Hsts typical products. 

The dry powder process has several additional advantages over the wet process. For example, much less waste of enamel occurs because the dry over-spray is airborne and recycled in a closed system. No-pidde ground coats have broadened the apphcation of both wet-process and dry-process systems. These enamels are appHed over cleaned-only metal. Thus the problems of disposing of pickling acid wastes containing iron sulfates and nickel wastes are eliminated (see Metal surface treatments) (7). 

Chemical Designations - Synonyms Ammonium ferrous sulfate. Ammonium iron sulfate. Ferrous ammonium sulfate hexahydrate. Iron ammonium sulfate, Mohr s salt Chemical Formula Fe(NH4)j(S04)j 6Hj0. 

Iron, reaction with nitroarenes, 928 lron(lll) bromide, aromatic bromination and, 548 Iron sulfate, LD5q of, 26 Isoamyl group, 89 lsobutane, molecular model of, 80 lsobutyl group, 84... 

Chemical properties depend on the ways in which a substance interacts (reacts) with other substances. Sulfuric acid reacts with iron to form iron sulfate and hydrogen. 

This is a chemical reaction. The fact that iron reacts when it comes into contact with sulfuric acid is a chemical property of iron. Conversely, the ability of sulfuric acid to affect iron is a chemical property of sulfuric acid. The sulfuric acid and iron are called reactants in the above equation, and the iron sulfate and hydrogen are the products of the reaction. 

Chrome green is produced by mechanically mixing chrome yellow and iron blue pigments in water. An iron blue, [Fe(NH4) (FeCN6)], is an oxidized precipitate product of the reaction between an aqueous solution of iron sulfate and ammonium sulfate with sodium hexacyanoferrate. 

Lead, iron, sulfates, and suspended solids Wastewater is acidic. 

The name of compounds whose molecules contain three or more elements, usually including oxygen, ends in the suffix ate. Thus the chemical name for limestone, whose chemical formula is CaC03, is calcium carbonate. That of green vitriol, also known as copperas, whose formula is FeS04, is iron sulfate. The names and formulas of some chemical compounds related to archaeological studies are listed in Table 7. 

Alum Borax Natron Iron vitriol Mineral Mineral Mineral Mineral or synthetic Sulfate of aluminum and other metals (e.g., potassium alum) Hydrated sodium borate Natural mixture sodium carbonate and sodium bicarbonate Hydrated iron sulfate... 

Dining preparation of iron(II) perchlorate, a mixture of iron sulfate and perchloric acid was being strongly heated when a most violent explosion occurred. Heating should be gentle to avoid initiating this redox system. 

Thiourea can also be lost from the system by the formation of stable iron sulfate complexes,63,66... 

In the pediatric population, the daily dose of elemental iron, administered as iron sulfate, is 3 mg/kg for infants and 6 mg/kg for older children for 4 weeks. If response is seen, iron should be continued for 2 to 3 months to replace storage iron pools. The dose and schedule of vitamin B12 should be titrated according to clinical and laboratory response. The daily dose of folate is 1 to 3 mg. 

Sulfate is needed as an electron acceptor for the sulfate reduction process, but normally, it is available in unlimited concentrations in wastewater. If this is not the case, iron sulfate may support the process. The anaerobic fermentation processes still proceed, and the odorous organic substances produced are generally not affected by the addition of iron salts. 

Subsequent reaction of porphyrazines 170 and 171 with Cu(OAc)2 resulted in the selective metalation within the macrocyclic cavity to provide the corresponding copper complexes 166 (62%) and 172 (47%). Treatment of pz 170 with manganese acetate and iron sulfate in dimethyl sulfate gave the dmso adducts 173 (70%) and 174 (85%), respectively (168). Axial ligation was also observed when other metals were incorporated such as cobalt acetate, nickel acetate, and zinc acetate to give the metal complexes 175 (83%), 176 (70%), and 177 (90%) as the hydrates. The axial ligand of... 

Experiments have shown that treating with iron sulfate does cause algae to bloom with patches tens of miles long. But when the extra plants... 

Iron sulfate Saturated s s Picric acid Solution s s... 

Also known as black iron oxide iron monoxide. fer as ak.sTd ferrous sulfate inorgchem FeS04-7H20 Blue-green, water-soluble, monoclinic crystals used as a mordant in dyeing wool, in the manufacture of ink, and as a disinfectant. Also known as copperas ferrisulphas green copperas green vitriol iron sulfate. fer as sal,fat ... 

Rank a series of different Measure the amount CBL unit iron sulfate... 

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