Potassium sulfate, crystallization solubility

Basicity chrome alum CCRIS 7532 Chrome alum Chrome potash alum Chromic potassium sulfate Chromic potassium sulphate Chromium potassium bis(sulphate) Chromium potassium sulfate (1 1 2) Chromium potassium sulfate (CrK(S04)2) Chromium potassium sulphate Chromium(lll) potassium sulfate Crystal Chrome Alum EINECS 233401-6 Potassium chromic sulfate Potassium chromic sulphate Potassium chromium alum Potassium chromium disulfate (KCr(S04)2) Potassium disulphatochromate (III) Sulfuric acid, chromium(3 ) potassium salt (2 1 1). Mordant for dyeing fabrics uniformly [dodecahydratej mp = 89° d = 1.83 soluble in 4 parts H2O. 

Potassium sulfate has a solubility of 15 g/100 g water at 40°C. A solution is prepared by adding 39.0 g of potassium sulfate to 225 g of water, carefully heating the solution, and cooling it to 40°C. A homogeneous solution is obtained. Is this solution saturated, unsaturated, or supersaturated The beaker is shaken, and precipitation occurs. How many grams of potassium sulfate would you expect to crystallize out ... 

A well-mixed continuous crystallizer is to be used to separate potassium sulfate from an aqueous solution by cooling crystallization. The solubility of potassium sulfate can be represented by the expression ... 

Potassium sulfate is separated from the more soluble magnesium chloride by crystallization. 

Rubidium is recovered from its ore lepidolite or pollucite. Mineral lepidolite is a lithium mica having a composition KRbLi(OH,F)Al2Si30io. The ore is opened by fusion with gypsum (potassium sulfate) or with a mixture of barium sulfate and barium carbonate. The fused mass is extracted with hot water to leach out water-soluble alums of cesium, rubidium, and potassium. The solution is filtered to remove insoluble residues. Alums of alkali metals are separated from solution by fractional crystallization. Solubility of rubidium alum or rubidium aluminum sulfate dodecahydrate, RbAl(S04)2 I2H2O falls between potassium and cesium alum. 

The tables of solubility show that at 20° about 11 g. of potassium sulfate dissolves in 100 g. of water, while at 100° about 24 g. dissolves. Crystals will therefore form rather slowly from a cooling saturated solution. 

Properties Shiny crystals, insoluble in alcohol, soluble in water and concentrated potassium sulfate solution. 

Arcanum duplicatum Caswell No. 702 Dipotassium sulfate EINECS 233-558-0 EPA Pesticide Chemical Code 005603 Glazier s salt HSDB 6047 Kalium sulphuricum Potassium sulfate Potassium sulphate Sal Polychrestum Sulfuric acid, dipotassium salt Sulphuric acid, potassium salt Tartarus vitriolatus. Analytical reagent, medicine (cathartic), gypsum cements, fertilizer, manufacture of alum and glass, food additive. Registered by EPA as a herbioide and insecticide. Colorless, hard crystals, mp = 1067° d = 2.66 soluble in H2O (12 g/100 ml at 25°, 25 g/100 ml at 100°),... 

It forms soft, flexible, lemon-yellow crystals, permanent in air at ordinary temperatures. They begin to lose Aq at 60° (140° F.), and become anhydrous at 100° (213° F.). Soluble in HaO insoluble in alcohol, which precipitates it from its aqueous solution. When calcined with KHO or KaCOs, potassium cyanid and cyanate are formed, and Fe is precipitated. Heated with dilute HaSOi, it yields an insoluble white or blue salt, potassium sulfate, and hydrocyanic acid. Its solutions form with those of many of the metallic salts insoluble ferrocyanids those of Zn, Pb, and Ag are white, cupric ferrocyanid is mahogany-colored, fer-... 

It is a powerful base neutralizes and dissolves in concentrated HjS04 without coloration and precipitates many metallic oxids from solutions of their salts. Its salts are mostly crystallizable, soluble in H 0 and alcohol, and intensely bitter. The acetate is the most soluble. The neutral sulfate crystallizes, with 7 Aq, in rectangular prisms. The iodids of methyl and ethyl react with strychnin to produce the iodids of methyl or ethylstrychnium, white, crystalline, basic substances, producing an action on the economy similar to that of curare. When acted on by HaSOi and potassium chlorate, with proper precautions, strychnic or igasuric acid is formed. 

Potassium hydroiqrlamlne disulfonate is dissolved in the smallest possible quantity of boiling water the solution is boiled for several hours and then evaporated to induce crystallization. The solution is separated from the potassium sulfate formed hydroxylammonlum sulfate is obtained by further evaporation. The pure product is obtained by further fractional crystallization. The crude salt mixture obtained by evaporation can also be extracted with alcohol in a Soxhlet apparatus, since the hydro qrlamine salt is soluble in... 

Potassium Aluminum Sulfate. Potassium aluminum sulfate [7784-24-9]. KAl(SO 12H20, is a white, astringent crystal known as potassium alum, ordinary alum, or potash alum. Its formula weight is 474.39 mp 92.5 °C sp gr 1.75 and solubiUty 11.4 g per 100 mL H2O at 20°C (8). It is soluble in dilute acid and insoluble in alcohol. It dehydrates at about 200 °C to porous desiccated potassium alum [10043-67-1], KAl(SO dried or burnt alum, which has a formula weight of 258.20. 

B. 2,5-Dimethylmandelic acid. A mixture prepared from 140 g. (0.5 mole) of 2,5-dimethylphenylhydroxymalonic ester and a cold solution of 140 g. of potassium hydroxide in 560 ml. of water in a 1-1. round-bottomed flask is warmed on a steam bath for 5 hours. The alkaline solution is cooled and extracted with one 100-ml. portion of ether to remove any material not soluble in alkali. The alkaline solution is acidified with 300 ml. of concentrated hydrochloric acid and then warmed on a steam bath and stirred for 2 hours (or until there is no further evidence that carbon dioxide is escaping). The mixture is cooled, the oily layer is extracted with ether, the ethereal solution is dried with anhydrous sodium sulfate, and the ether is distilled under partial vacuum (Note 3). The oily residue is crystallized from benzene. The yield of 2,5-dimethyImandelic acid melting at 116.5-117° is 55-63 g. (63-70%) (Note 4). 

Cyanate Ammonium cyanate KH4CNO, white solid, soluble, formed by fractional crystallization of potassium cyanate and ammonium sulfate (ammonium cyanate is soluble in alcohol), when heated changes into urea. 

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