Ferrous hydroxide iodide

Eisen-hydrozyd, n. ferric hydroxide, iron(III) hydroxide, -hydroxydul, n. ferrous hydroxide, iron(II) hydroxide. -jodid,n. iron iodide, specif, ferric iodide, iron(III) iodide, -jodiir, n. ferrous iodide, iron(II) iodide, -jodiirjo-did, n. ferrosoferric iodide, iron(II,IIl) iodide, kalium, n. potassium ferrate, -kaliumalaun,... 

This acid is obtained by the direct nitration of p-carbomethoxyphenyl-arsinic acid at 0° C. by mixed acid, then allowing the temperature to rise to 20° C. The yield is about 75 per cent., and the product crystallises from water in coarse yellow prisms. When reduced by ferrous hydroxide, the acid yields 8-hydroxy-l 4-ben2isoxa2ine-6-arsinic acid (p. 429). IMien the nitro-acid is reduced by sulphiu dioxide and potassium iodide in-hydrochloric acid solution, a 70 per cent, yield of the diokloroarsine is obtained in rosettes of plates, very resistant to aqueous hydrolysis attempts to reduce this by stannous chloride or sodium hyposulphite have been unsuccessful. Ferrous hydroxide gives a small yield of 8-hydroxy-l 4-benzz soxazine-6-aisenoxide. 

Wet-Chemical Determinations. Both water-soluble and prepared insoluble samples must be treated to ensure that all the chromium is present as Cr(VI). For water-soluble Cr(III) compounds, the oxidation is easily accompHshed using dilute sodium hydroxide, dilute hydrogen peroxide, and heat. Any excess peroxide can be destroyed by adding a catalyst and boiling the alkaline solution for a short time (101). Appropriate ahquot portions of the samples are acidified and chromium is found by titration either using a standard ferrous solution or a standard thiosulfate solution after addition of potassium iodide to generate an iodine equivalent. The ferrous endpoint is found either potentiometricaHy or by visual indicators, such as ferroin, a complex of iron(II) and o-phenanthroline, and the thiosulfate endpoint is ascertained using starch as an indicator. 

Schnepfe [83] has described yet another procedure for the determination of iodate and total iodine in seawater. To determine total iodine 1 ml of 1% aqueous sulfamic acid is added to 10 ml seawater which, if necessary, is filtered and then adjusted to a pH of less than 2.0. After 15 min, 1 ml sodium hydroxide (0.1 M) and 0.5 ml potassium permanganate (0.1M) are added and the mixture heated on a steam bath for one hour. The cooled solution is filtered and the residue washed. The filtrate and washings are diluted to 16 ml and 1ml of a phosphate solution (0.25 M) added (containing 0.3 xg iodine as iodate per ml) at 0 °C. Then 0.7 ml ferrous chloride (0.1 M) in 0.2% v/v sulfuric acid, 5 ml aqueous sulfuric acid (10%) - phosphoric acid (1 1) are added at 0 °C followed by 2 ml starch-cadmium iodide reagent. The solution is diluted to 25 ml and after 10-15 min the extinction of the starch-iodine complex is measured in a -5 cm cell. To determine iodate the same procedure is followed as is described previously except that the oxidation stage with sodium hydroxide - potassium permanganate is omitted and only 0.2 ml ferrous chloride solution is added. A potassium iodate standard was used in both methods. 

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... 

Sodium iodide, Nal.—The iodide is prepared by neutralizing sodium hydroxide or earbonate with hydriodic acid or by the action of iodine on sodium hydroxide, and reduction with charcoal of the iodate simultaneously formed or from sodium hydroxide and iodine in presence of iron-filings or ferrous iodide. 

Ammonium iodide, NH4I.—The iodide is formed by methods analogous to those applicable to the bromide.3 It is also a product of the decomposition of nitrogen iodide in presence of water or ammonium hydroxide.4 It is best prepared by addition of alcohol to an aqueous solution of potassium iodide and ammonium sulphate in equimolecular proportions, potassium sulphate crystallizing and ammonium iodide remaining dissolved.5 It can also be prepared by the interaction of ferrous iodide and ammonium carbonate, and by that of ammonium hydroxide and iodine in presence of hydrogen peroxide 6... 

Bromine attacks it at red heat with incandescence chlorine is less vigorous in its action, whilst iodine and hydrogen iodide have no action, even at 1100° C. The chlorate and nitrate of potassium do not affect it at their melting-points, but at higher temperatures decompose it with incandescence. Fused alkali hydroxides and carbonates decompose it rapidly. Concentrated sulphuric acid is without action in the cold, but with the boiling acid ferrous sulphate is produced. Dilute nitric acid dissolves it when hot, and the concentrated acid acts vigorously. Dilute hydrochloric acid is without action, and the hot concentrated acid acts only slowly. 

It does not react with silver nitrate. On treatment of an aqueous solution of cyanogen iodide with potassium hydroxide and subsequent addition of ferrous and ferric salts and hydrochloric acid, a precipitate of Prussian blue is obtained. ... 

Derivation Action of hydriodic acid on barium hydroxide or of barium carbonate on ferrous iodide solution. 

Other groups used carbonate scrubbers, glass fiber filters impregnated with potassium hydroxide and, prefilters impregnated with sodium hydroxide to specifically remove sulfur dioxide from sample air streams. Other methods have included the use of ferrous sulfate (FeS04), potassium-iodide-coated filter paper, and neutral aqueous potassium iodide solution. 

Nitric acid in the aqueous phase was determined by the method used by Barduhn and Kobe(15), i.e. titration against st6uridard ferrous sulphate. Nitrous acid was ainalysed using formation of a diazonium salt between m-nitroaniline and nitrous acid. Standard m-nitroaniline solution was titrated against a known volume of the sample acidified with dilute hydrochloric acid until testing with starch iodide paper demonstrated the absence of free nitrous acid. The total acidity of the aqueous phase was obtained by titration against standard sodium hydroxide. 

Copper hydroxide (ic) Copper iodide (ous) Cupric sulfate anhydrous Ferric chloride Ferric chloride hexahydrate Ferrous sulfate anhydrous L-Glutamine Griseofulvin L-Histidine Iodine Iron ammonium citrate Manganese acetate (ous) Manganese chloride (ous), tetrahydrate Manganese citrate (ous) Phenothiazine... 

Ammonium Hydroxide Anunonium Thiosulfate Ammonium Thiosulfate Ammonium Iodide Ferrous Ammonium Sulfate... 

Dilute 50 ml of syrup to 400 ml, precipitate with sodium hydroxide and a little bromine water, to oxidise any iron in the ferrous state. Bring the mixture to the boil and allow the precipitate to settle. After filtration on paper in a Gooch crucible, dissolve the precipitate in hydrochloric acid, reprecipitate with sodium hydroxide and redissolve in hydrochloric acid. Add potassium iodide and titrate with 0 1 N thiosulphate. 1 ml = 0 005585 g Fe. 

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