Ammonium molybdates bromide

Ammonium acetate Ammonium adipate Ammonium benzoate Ammonium bicarbonate Ammonium biflluoride Ammonium binoxalate Ammonium bisulfate Ammonium bitartrate Ammonium tetraborate Ammonium bromide Ammonium carbonate Ammonium chloride Ammonium citrate Ammonium diclnomate Ammonium fluoride Ammonium fluorosilicate Ammonium gluconate Ammonium iodide Ammonium molybdate Ammonium nitrate Ammonium oxalate Ammonium perchlorate Ammonium picrate Ammonium polysulfide Ammonium salicylate Ammonium stearate Ammonium sulfate Ammonium sulfide (hydrosulfide) Ammonium tartrate Ammonium tliiocyanate Ammonium thiosulfate... 

Industrially, terephthalic acid is produced by the cobalt(III) acetate, manganese(III) acetate, or ammonium molybdate-catalyzed air oxidation of />-xylene in acetic acid. Sodium bromide reduces the induction period and increases the rate of conversion to terephthalic acid. p-Xylene is initially oxidized to p-methylbenzyl hydroperoxide, and further oxidation gives p-methylbenzaldehyde and p-methylbenzoic acid ... 

Ammonium bromide Ammonium molybdate (VI) Anthranilic acid Barium dinonyinaphthalene sulfonate Barium petroleum sulfonate... 

If metallic tin is fumed with ammonium bromide, volatile stannous bromide results. The latter can be identified by the immediate blue color (molybdenum blue) that forms on treatment with ammonium molybdate or, better, with a solution of phosphomolybdic acid that has been decolorized with excess ammonium acetate. 

Aluminum chloride, 26% Aluminum hydroxide Aluminum nitride Ammonia, dry vapor Ammonium acetate solution Ammonium bisulfate Ammonium bromide Ammonium carbonate Ammonium chloride, 10% Ammonium dichloride Ammonium hydroxide Ammonium hydroxide vapor Ammonium molybdate Ammonium nitrate Argon... 

Bromides may be determined by the titrimetric method of KolthofF and Yutzy in which the bromide is oxidised to bromate with sodium hypochlorite in the presence of a sodium dihydrogen phosphate buffer after destruction of the excess hypochlorite with sodium formate the bromate is determined iodometrically after adding ammonium molybdate as a catalyst to accelerate the liberation of iodine. The method, which is applicable in the presence of a considerable excess of chloride, has been critically examined by Haslam and Moses who recommended the following procedure ... 

Aminoethanol 2-Aminoisobutyric Acid Ammonia Ammonia Solution Ammonium Ammonium Acetate Ammonium Alum Ammonium Bicarbonate Ammonium Bichromate Ammonium Bifluoride Ammonium Bromide Ammonium Carbonate Ammonium Chloride Ammonium Dichromate Ammonium Fluoride Ammonium Glycolate Ammonium Hydrogen Carbonate Ammonium Hydrogen Fluoride Ammonium Hydrosulfide Ammonium Hydroxide Ammonium Hyposulfite Ammonium Iron Sulfate Ammonium Molybdate Ammonium m-Phosphate Ammonium Nitrate Ammonium o-Phosphate Ammonium Oxalate Ammonium Peroxydisulfate Ammonium Persulfate Ammonium Phosphate Ammonium Phosphate Dibasic Ammonium Rhodanide Ammonium Sulfamate Ammonium Sulfate Ammonium Sulfide Ammonium Thiocyanate Ammonium Thioglycolate Ammonium Thiosulfate... 

H. Stamm also measured the solubilities of the salts of the alkalies in liquid ammonia —potassium hydroxide, nitrate, sulphate, chromate, oxalate, perchlorate, persulphate, chloride, bromide, iodide, carbonate, and chlorate rubidium chloride, bromide, and sulphate esesium chloride, iodide, carbonate, and sulphate lithium chloride and sulphate sodium phosphate, phosphite, hypophosphite, fluoride, chloride, iodide, bromate, perchlorate, periodate, hyponitrire, nitrite, nitrate, azide, dithionate, chromate, carbonate, oxalate, benzoate, phtnalate, isophthalate ammonium, chloride, chlorate, bromide, iodide, perchlorate, sulphate, sulphite, chromate, molybdate, nitrate, dithionate, thiosulphate, persulphate, thiocyanate, phosphate, phosphite, hypophosphite, arsenate, arsenite, amidosulphonate, ferrocyanide, carbonate, benzoate, methionate, phenylacetate, picrate, salicylate, phenylpropionate, benzoldisulphonate, benzolsulphonate, phthalate, trimesmate, mellitate, aliphatic dicarboxylates, tartrate, fumarate, and maleinate and phenol. 

A sample of 2 g. of ammonium para-molybdate is treated with 20 ml. of 9 M hydrobromic acid and is gently boiled to drive off the liberated bromine. The solution is evaporated almost to dryness. The process is repeated with a second 20-ml. portion of hydrobromic acid. Finally the residue is dissolved in 10 ml. of 9 M hydrobromic acid. The solution is concentrated to half volume and cooled in a freezing mixture. Anhydrous hydrogen bromide gas is rapidly passed through this solution to precipitate reddish-brown, crystalline ammonium pentabromooxomolybdate(2 —). This solid is filtered and dried in a vacuum desiccator over solid KOH to constant weight yield is 3 g. Anal. Calcd. for (NH4)2[MoOBr5] Mo, 17.52 Br, 73.00 N, 5.11. Found Mo, 18.01 Br, 72.51 N, 5.48. The oxidation state of the metal was found to be 4.99, and the magnetic moment pen = 1.79 B.M. at 303°K. 

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