Sodium bisulphate

Sodium aluminium sulphate Sodium bisulphate Sodium hypochlorite Sodium perchlorate Sodium thiocyanate Stannic ammonium chloride Stannic chloride Stannous chloride Uranyl nitrate Zinc chloride Zinc fluorosilicate... 

A substance added to latex in the preparation of pale crepe rubber sodium bisulphate prevents darkening of the crepe due to the presence of oxidising enzymes, xylyl mercaptan is an effective bleaching agent proper. 

The sal natron liquor, prepared by heating crude nitrate from the aqua vicja tanks with 15 per cent, of coal dust, is made into a cone 5 ft. high with a kind of moat dug round the base of the cone. The cone is sat. with water and ignited. The crude sodium carbonate formed fuses and runs into the pit. The product dissolved in water forms the sal natron liquor. The sodium bisulphate soln. is made by passing the fumes of burning sulphur into the sal natron liquor. The liquid acid is then acid enough to liberate iodic acid from iodates. 

Thermal Stability of Sulphates. 1. Put 1-2 g of sodium bisulphate into a small porcelain bowl or crucible. First carefully heat it, and then strongly roast it. What compounds form Write the equations of the reactions. 

Tetrahydropyran [142-68-7] M 86.1, b 88.0 , n 1.4202, d 0.885. Dried through a column of silica gel to remove olefinic impurities and fractionally distd. moisture by refluxing with sodium, then distilling from LiAlH4. Alternatively, peroxides can be removed by treatment with aqueous ferrous sulphate and sodium bisulphate, followed by solid KOH, and fractional distn from sodium. 

Heavy Metals.—The solution of 1 gm. of sodium bisulphate in 20 cc. of water should not be affected by hydrogen sulphide water nor should it show any change on making it alkaline with ammonia water, and then adding ammonium sulphide solution. 

Arsenic. — The mixture of 1 gm. of powdered sodium bisulphate with 3 cc. of stannous chloride solution should not acquire a darker color within one hour. 

Potassium, — The yellow-colored flame produced by sodium bisulphate, when observed through cobalt glass, should exhibit only a transient violet color. 

Quantitative Determination, — Dissolve 1 gm. of sodium bisulphate in 50 cc. of water, and titrate with normal potassium hydroxide, using methyl orange as the indicator. 

Cone. soln. of two mol. eq. of sodium nitrite and one of sodium carbonate are treated with sulphur dioxide until the mixture has an acid reaction. The sodium salt of hydroxylamine disulphuric acid, H0.N(HS03)s> is formed, and this decomposes on the addition of a little sulphuric acid into the sodium salt of hydroxylamidosulphonie acid, HO-NH.HSO, and sodium hydrosulphate, NaHS04. When the first-named salt has stood a couple of days at 90°-95°, it breaks down still further into hydroxylamine, HO-NHj, and sodium bisulphate. The latter is first crystallized from the soln., and crystals of hydroxylamine sulphate are subsequently separated. Potassium salts do not give so good a yield as the sodium salts. Very little ammonia is formed. W. L. Semon modified this process. 

Originally, salt and sodium bisulphate were treated in the Mannheim furnace. Sodium bisulphate was previously a residue in the manufacture of nitric acid and was used instead of sulphuric acid. Ground bisulphate was mixed with salt... 

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