Solution Potassium Hydroxide Stannous Chloride

This reaction does not proceed in carbon tetrachloride solution.10 Retgers 11 stated that the solid hydride resulted when arsine was heated or when the flame of arsine impinged on a cold plate but other observers 12 maintain that arsenic alone is produced. A solid hydrogen-containing product has also been obtained by the action of zinc, in the presence of sulphuric and nitric acids, on arsenious oxide,13 and by the action of arsine on solid potassium hydroxide,14 followed by the addition of water. A good yield (up to 98 per cent.) of the hydride in a comparatively pure state may be obtained by mixing an ether solution of stannous chloride with a solution of arsenic trichloride in dilute hydrochloric acid.15 The reaction is ... 

The presence of gold in any of the precipitates described can be detected by solution in aqua regia, and reduction to metallic gold by various reagents, including ferrous chloride, ferrous sulphate, mercurous nitrate, stannous chloride, hypophosphorous acid, oxalic add,3 sulphurous acid, hydrogen peroxide and potassium hydroxide, formaldehyde, and hydroxylamine hydrochloride.4... 

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. 

In 1888 Meyer isolated the first stannonic acid, R.SnO.OH, whieh gives rise to compounds containing only one alkyl group, RSnXg, when treated with acids. The stannonic acids themselves are pi epared by the interaction of alkyl iodides and stannous chloride in potassium hydroxide solution, and are all white, amorphous products. 

Methyl stannonic acid. —Preparation Twenty grams of stannous chloride in 50 c.c. of water are added with stirring to 100 c.c. of 20 per cent, potassium hydroxide, and the mixture treated with 14 grams of methyl iodide in 100 c.c. of alcohol. The whole is allowed to stand for three days and should be frequently shaken. The alcohol is removed at 40° C., and hydrochloric acid added until the solution is acid and the white, gelatinous precipitate begins to redissolve. The latter is filtered, washed free from chloride by cold water, and dried in vacuo over sulphuric acid. Yield 13 5 grams. The reaction takes place according to the equation ... 

Tin molybdenum catalyst was prepared by precipitation of a solution of stannous chloride with aqueous ammonia. It was filtered and washed till chloride free. A solution of ammonium molybdate, potassium hydroxide and chromic oxide were added to above precipitate and was evaporated to dryness on sand bath. It was dried at I I0°C and calcined at... 

Chemicals used in the quality control analyses in the shieided glove box (SGB) and ventilation hoods of the Quality Control Laboratory involve small (less than a liter) quantities of some acidic and basic chemicals, including ammonium thiocyanate, stannous chloride, sulfuric, nitric, and hydrochloric acids, ferric sulfate, carrier solutions, ethyl acetate, sodium nitrite, chloroform, sodium hydroxide, and potassium iodide. Material Safety Data Sheets for any processes implemented in the HCF are reviewed in accordance with the SNL ES H Manual to identify any carcinogens or other hazardous materials. Operations in the SGB for preparation of various Mo-99 product dilution samples would require a small bulk supply of sodium hydroxide (0.1 N NaOH). Quality control analysis sample preparation operations require small bulk supplies of the above chemicals. Workers performing quaiify control analysis use chemical handling procedures as required by the Sandia ES H Manual. 

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