Potassium sodium sulphate

Okada, K., and J. Ossaka (1980). Structures of Potassium Sodium Sulphate and Tripotassium Sodium Disulphate . Acta Crystallographica Section B Structural Crystallography aitd Crystal Chemistry 36 919-921. 

Why is potassium aluminium sulphate not soluble in benzene A compound M has the composition C = 50.0% H=12.5%o A1 = 37.5%. 0.360 g of M reacts with an excess of water to evolve 0.336 1 of gas N and leave a white gelatinous precipitate R. R dissolves in aqueous sodium hydroxide and in hydrochloric acid. 20 cm of N require 40 cm of oxygen for complete combustion, carbon dioxide and water being the only products. Identify compounds N and R, suggest a structural formula for M, and write an equation for the reaction of M with water. (All gas volumes were measured at s.t.p.)... 

Sodium sulphate crystallises out in hydrated form (common ion effect) and is filtered off on concentration, sodium dichromate is obtained. For analytical purposes, the potassium salt. K2Cr20-. is preferred potassium chloride is added and the less soluble potassium dichromate obtained. 

Decant the liquid layer into a 2 5 litre flask, and dissolve the sodium derivative of acetylacetone in 1600 ml. of ice water transfer the solution to the flask. Separate the impiue ethyl acetate layer as rapidly as possible extract the aqueous layer with two 200 ml. portions of ether and discard the ethereal extracts. Treat the aqueous layer with ice-cold dilute sulphimic acid (100 g. of concentrated sulphiu-ic acid and 270 g. of crushed ice) until it is just acid to htmus. Extract the diketone from the solution with four 200 ml. portions of ether. Leave the combined ether extracts standing over 40 g. of anhydrous sodium sulphate (or the equivalent quantity of anhydrous magnesium sulphate) for 24 hours in the ice chest. Decant the ether solution into a 1500 ml. round-bottomed flask, shake the desiccant with 100 ml. of sodium-dried ether and add the extract to the ether solution. Distil off the ether on a water bath. Transfer the residue from a Claisen flask with fractionating side arm (Figs. II, 24, 4r-5) collect the fraction boiling between 130° and 139°. Dry this over 5 g. of anhydrous potassium carbonate, remove the desiccant, and redistil from the same flask. Collect the pure acetji-acetone at 134r-136°. The yield is 85 g. 

For some purposes, modifications of the calomel electrode may be preferred. Thus, if it is necessary to avoid the presence of potassium ions, the electrode may be prepared with sodium chloride solution replacing the potassium chloride. In some cases the presence of chloride ions may be inimical and a mercury(I) sulphate electrode may then be used this is prepared in similar manner to a calomel electrode using mercury)I) sulphate and potassium sulphate or sodium sulphate solution. 

A solution of the primary amine (lOmmol), t-butylchlorodiphenylsilane (lOmmol), and triethylamine (15mmol) in MeCN (30ml) was stirred at ambient temperature for 1-3 h. The reaction mixture was concentrated in vacuo, and the residue was partitioned between hexane/AcOEt (4 1), and 1 M sodium hydrogen carbonate solution. The organic phase was dried over a mixture of potassium carbonate and sodium sulphate. 

Aluminium potassium sulphate AlKiSOj) 2.58,20 10043-67-1 Aluminium sodium sulphate AINatSOi) 242.09 10102-71-3 Ammonium tetrachtoroalumiDale KHiAICi4 186.83 7784-14-7... 

Plugging solution contains Portland cement, sodium sulphate, potassium ferricyanide and nitrile-tri-methyl-phosphonic acid. Patent SU 1700204-A, 1991. 

P. F. Tsytsymushkin, S. R. Khajmllin, A. P. Tamavskij, Z. N. Kudryashova, and B. V. Mikhajlov. Plugging solution contains Portland cement, sodium sulphate, potassium ferricyanide and nitrile-tri-methyl-phosphonic acid. Patent SU 1700204-A, 1991. 

In all 28 parameters were individually mapped alkalinity, aluminum, antimony, arsenic, barium, boron, bromide, cadmium, calcium, chloride, chromium, conductivity, copper, fluoride, hardness, iron, lead, magnesium, manganese, nitrate, pH, potassium, selenium, sodium, sulphate, thallium, uranium, and zinc. These parameters constitute the standard inorganic analysis conducted at the DENV Analytical Services Laboratory. 

SRS skids have been proposed for a number of different types of sulphate removal operations, including sodium sulphate from sodium bromide solutions, sodium chlorate solutions and potassium sulphate from potassium chloride solutions. All of these different separations have been tested on a commercial spiral-wound membrane and the results have been good. 

In this procedure the soil sample (spiked with isotopic marker compounds) is processed in a two-part enrichment procedure (Fig. 5.3). In part I, a mixture of the sample and sodium sulphate is subject to solvent extraction, and the extract is, in the same process, passed through a series of silica-based adsorbents and then through the carbon/glass fibre adsorbent. The extract passes through the adsorbents in the following order potassium silicate, silica gel, cesium or potassium silicate, silica gel and finally an activated-carbon... 

Anhydrous sodium sulphate, even when freshly ignited before use, is much less active than calcium chloride. It is used when a substitute for calcium chloride is indicated for the reasons given above. For solutions of basic substances ignited potassium carbonate, solid potassium hydroxide, and barium oxide are much used as drying agents. 

---