Silver nitrate decomposition

At room temperature bismuthine rapidly decomposes into its elements. The rate of decomposition increases markedly at higher temperatures (8). Bismuthine decomposes when bubbled through silver nitrate or alkafl solutions but is unaffected by light, hydrogen sulfide, or 4 sulfuric acid solution. There is no evidence for the formation of BiH, though the phenyl derivative, (C H BU, is known. The existence of BiH would not be anticipated on the basis of the trend found with other Group 15 (V) "onium" ions. 

Fig. 5. HREM of enclosed silver particles in CNTs. The metallic particles were obtained by electron irradiation-induced decomposition of introduced silver nitrate. Note that the gases produced by the nitrate decomposition have eroded the innermost layer of the tube.

The decomposition of the nitrates produces oxygen molecules, and we have verified that if a mixture of silver nitrates and closed tubes is submitted to a thermal treatment (400°C) decomposing the salt, it is possible to observe filled CNTs (Ag, Co, Cu [34]). It appears that oxygen liberated during the thermal decomposition of the metal salt erodes the CNT tip and the yet un-decomposed salt then enters by capillarity (see Fig. 8). We have also observed during the electron-irradiation decomposition of enclosed nitrate that the liberated gases erodes the CNT cavity [22] (see the innermost tubes in Fig. 5). 

The 5-isobutoxymethyl monothioacetal is stable io2N hydrochloric acid and to 50% acetic acid some decomposition occurs in 2 A sodium hydroxide. The monothioacetal is also stable to 12 A hydrochloric acid in acetone (used to remove an A -triphenylmethyl group) and to hydrazine hydrate in refluxing ethanol (used to cleave an A-phthaloyl group). It is cleaved by boron trifluoride etherate in acetic acid, by silver nitrate in ethanol, and by trifluoroacetic acid. The monothioacetal is oxidized to a disulfide by thiocyanogen, (SCN)2. ... 

Determination of iodate as silver iodide Discussion. Iodates are readily reduced by sulphurous acid to iodides the latter are determined by precipitation with silver nitrate solution as silver iodide, Agl. Iodates cannot be converted quantitatively into iodides by ignition, for the decomposition takes place at a temperature at which the iodide is appreciably volatile. 

Ammoniacal silver oxide is as dangerous as the previous similar compounds. Thus, the clear solution, which is obtained after centrifuging ammoniacal silver oxide leaves a very explosive compound as a residue to which was attributed the AgaN4 formula. It seems that the decomposition of this nitride is inhibited by ammonium salts. A similar situation was created after treating this ammoniacal oxide with silver nitrate until a solid started to precipitate, and this detonated 10 to 14 days after being prepared. It was assumed that this solid was AggNH. 

Above 140°C its exothermic decomposition to metal and carbon dioxide readily becomes explosive [1], A 1 kg batch which had been thoroughly dried at 50°C exploded violently when mechanical grinding in an end-runner mill was attempted [2], Explosions have been experienced when drying the oxalate as low as 80°C [6], It is a compound of zero oxygen balance. The explosion temperature of the pure oxalate is lowered appreciably (from 143 to 122°C) by application of an electric field [3], The salt prepared from silver nitrate with excess of sodium oxalate is much less stable than that from excess nitrate [4], Decomposition at 125°C in glycerol prevents explosion in the preparation of silver powder [5],... 

Trirhenium nonabromide has been made (1) by direct combination of the elements 1 (2) by the thermal decomposition of rhenium (V) bromide, obtained by treating elemental rhenium with bromine at 650° 2 or (3) by the thermal decomposition of silver hexabromorhenate(IV),3-6 obtained from the metathesis of silver nitrate with potassium hexabromorhenate(IV).5-8 Of these methods, (3) has proven to be the simplest and most efficient route to pure trirhenium nonabromide. The following procedure is superior to that previously given,6 in that simpler equipment is used and larger quantities can be processed, with a resultant saving in time. 

Filtering and Drying the Silver Halide.—First heat the precipitate in the beaker on the boiling water bath. Heat silver iodide (and bromide) for two hours, since silver iodide forms with silver nitrate a solid compound which is only gradually decomposed by water. Further, when determining iodine, first reduce with sulphurous acid solution the silver iodate produced during the decomposition. 

The decomposition of N,N,N-trimethylcyclooctylammo-nium hydroxide forms a mixture of cis- and fions-cyclooctenes which contains ca. 60% of the trans- and 40% of the cfx-isomer (see Note 19). The mixture is separated by extraction of the /ra x-isomer with aqueous silver nitrate. ... 

An extremely mild method for the synthesis of nitrate esters from easily oxidized or acid-sensitive alcohols involves the decomposition of a nitratocarbonate (29). The nitratocar-bonate is prepared in situ from metathesis between a chloroformate (reaction between phosgene and an alcohol) and silver nitrate in acetonitrile in the presence of pyridine at room temperature. Under these conditions the nitratocarbonate readily decomposes to yield the corresponding nitrate ester and carbon dioxide. Few examples of these reactions are available in the literature and they are limited to a laboratory scale. 

Secondary nitramines have been prepared from the metathesis of dialkylcarbamyl chlorides with silver nitrate in acetonitrile followed by the spontaneous decomposition of the resulting dialkylcarbamyl nitrates.Yields of nitramine are low and accompanied by nitrosamine impurities. 

The nitrate, [Iren2(N02)o]N0.j, is obtained from the bromide by decomposition with silver nitrate. It crystallises in prisms. 

Dibromo-tetrammino-platinic Chloride, [Pt(NH3)4Br2]Cl2, is isomeric with dichloro-tetrammino-platinic bromide. It is formed by double decomposition between ammonium chloride and dibromo-tetrammino-platinic nitrate, when the salt separates as a yellow crystalline powder. Silver nitrate precipitates all the chloride and one atom of bromine in the molecule. 

Since the dihaloketones may induce the decomposition of the product, it is essential to cool the solution in ice befoie allowing entry of air. Otherwise, the oily cycloadduct becomes brown, and polymeric material has to be removed before crystallization by passage down a 2x5 cm. column of silica gel (impregnated with 12% silver nitrate solution and redried). 

Effect of Light on the Decomposition of Silver Chloride. Introduce 2 ml of a 0.1 W silver nitrate solution into a test tube and add dropwise such an amount of a saturated sodium chloride solution that will be sufficient for the complete precipitation of the silver as -a chloride. Rapidly filter out the precipitate, rinse it with water and put it on two watch glasses. Place one glass with the precipitate in a dark cupboard, and leave the other at a window in daylight. In an hour, compare the colour of the precipitates and explain the phenom->ena you observe. How does light affect the reaction After the experiment, put the precipitates containing a silver compound into he jars set aside for them. 

Salts of Nitric Acid. What products form when potassium, copper, lead, and silver nitrates are roasted How can the different nature of their decomposition be explained ... 

Silver Nitrate. Dissolve several silver nitrate crystals in water and determine the pH of the solution. Does silver nitrate hydrolyze Is silver hydroxide a strong or a weak base What products are obtained in the thermal decomposition of silver nitrate Write the equation of the reaction. 

Chretien and Woringer [34] described the preparation of silver cyanamide from calcium cyanamide by the action of silver nitrate and also described its explosive properties. Montagu-Pollock [35] described a method for growing large crystals of the salt from its aqueous solution in the presence of ammonium nitrate, ammonia and a surface active agent. Bowden and Montagu-Pollock [36] and Montagu-Pollock [35] studied the slow decomposition of the crystals when heated at temperatures from 150 to 360°C. The course of decomposition was studied by electron microscope. 

In addition to the analysis of the thermal stability of the perchloric acid organic reaction media mixtures, a procedure was worked out to determine the fate of the perchloric acid by chlorine analysis of the batch, effluent streams, etc. Preliminary analyses on selected process samples showed no tendency for perchloric acid to concentrate in recycle material and therefore build up in the reactor. A total of less than 1% of the initial charge of perchloric acid (total chlorides calculated as perchloric acid) was found in the combined recovered acid-ester and olefin fractions. Less than 1 % of the initial charge of perchloric acid was found in the finished ester. The analytical method used was an oxygen bomb decomposition, followed by titration of chlorides with 0.0liV silver nitrate, using a recording automatic titrator. The eventual fate of the perchloric acid catalyst was... 

Ammonia in aqueous solution is vigorously oxidised to nitrogen by perdisulphates in the presence of silver nitrate 2 or copper sulphate.3 In the latter case the ammonia is first oxidised to nitrous acid, and the decomposition proceeds, as heat develops, according to the scheme ... 

Silver nitrate causes vigorous decomposition of a neutralised solution of permonosulphuric acid, ozonised oxygen being rapidly evolved manganese dioxide and lead dioxide produce a similar effect.5... 

Detection and Estimation.—The decomposition of thiosulphates by means of hydrochloric acid to yield sulphur dioxide with separation of sulphur serves as a primary identification test, the limit of sensitiveness being about 0-1 mg. S203 per c.c.3 The alkali thiosulphates produce with silver nitrate solution a white precipitate of thiosulphate which gradually turns yellow, then brown, and finally black, due to the formation of sulphide the change is accelerated by warming 4... 

When silver sulphite or a mixture of sodium sulphite and silver nitrate is heated in boiling aqueous solution, decomposition occurs with formation of silver dithionate.1... 

Rice and Getz J made a very complete study of the matter from this point of view. At 65° C. they found k = 0-286, compared with the value 0-292 of Daniels and Johnston. In order to test the possibility that the reaction might depend on catalysis by dust, they compared the velocity constants for filtered and unfiltered nitrogen pentoxide and for gas which had been passed through an electrical dust precipitator. In some experiments the gas was dried with phosphorus pentoxide, in others not. In some it was prepared by the dehydration of nitric acid with phosphorus pentoxide and in others by the action of chlorine on silver nitrate. Nitric acid was found to have no catalytic effect on the decomposition. Some of the principal results are summarized below, all data referring to 65° C. 

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