Potassium sulfids

Soluble sulfides such as sodium sulfide, potassium sulfide, and calcium polysulfides have been used to precipitate mercury salts from alkaline solutions. When this procedure is used, exercise of caution is requked to maintain the pH within a given alkaline range so as to prevent evolution of H2S. Because the solubiUty of mercuric sulfide in water is 12.5 flg/L at 18°C or 10.7 ppb of mercury, use of this method for removal of mercury is adequate for most purposes. However, the presence of excess alkah, such as sodium hydroxide or sodium sulfide, increases the solubiUty of mercuric sulfide as shown ... [Pg.117]

In the days of alchemy and the phlogiston theory, no system of nomenclature that would be considered logical ia the 1990s was possible. Names were not based on composition, but on historical association, eg, Glauber s salt for sodium sulfate decahydrate and Epsom salt for magnesium sulfate physical characteristics, eg, spirit of wiae for ethanol, oil of vitriol for sulfuric acid, butter of antimony for antimony trichloride, Hver of sulfur for potassium sulfide, and cream of tartar for potassium hydrogen tartrate or physiological behavior, eg, caustic soda for sodium hydroxide. Some of these common or trivial names persist, especially ia the nonchemical Hterature. Such names were a necessity at the time they were iatroduced because the concept of molecular stmcture had not been developed, and even elemental composition was incomplete or iadeterminate for many substances. [Pg.115]

Methods for synthesis of the thia olium ring also have matured technically based on the cost, throughput, and waste disposal issues of production. In earlier syntheses, the 2-carbon and the sulfur atom were suppHed as potassium dithioformate, made from chloroform and potassium sulfide. [Pg.90]

Perfluoroisobutylene and potassium sulfide give 2,4-bis[hexafluoroisopro-pylidene]-l,3-dithietane and a small amount of the bis(perfluoro-tcrr-butyl)trisul-fide. The trisulfide is the result of a reaction of the nascent perfluoro-rerr-butyl carbanion with sulfur. The same products in different yields are obtained with sulfur and cesium fluoride [i] (equation 2). [Pg.736]

Schwefel-indium, n. indium sulfide. -jodUr, n. sulfur monoiodide, -kadmium, n. cadmium sulfide. -kalium,n. potassium sulfide, -kalk, m. lime-sulfur, -kalkbrtihe, /. lime-sulfur mixture (for spraying), -kalzium, n. calcium sulfide, -kammer, /. sulfur chamber, sulfuring room, sulfur stove, -karbolsaure, /. sulfo carbolic acid, -kastenbleiche, /. (Dyeing) stoving. [Pg.401]

A solution is prepared by diluting 0.7850 L of 1.262 M potassium sulfide solution with water to a final volume of2.000 L. [Pg.280]

In the potassium-sulfur system the compounds K2S, K2S2, K2S3, K2S4, K2S5, and K2S6 exist and there are six eutectics [15]. All sodium and potassium sulfides and polysulfides are hygroscopic and some of them form well defined hydrates. [Pg.130]

C03-0012. Determine the chemical formulas of potassium sulfide, barium perchlorate, and calcium... [Pg.144]

C03-0067. Write chemical formulas for these compounds (a) sodium sulfate (b) potassium sulfide (c) potassium dihydrogen phosphate (d) cobalt(II) fluoride tetrahydrate (e) lead(IV) oxide (Q sodium hydrogen carbonate and (g) lithium perbromate. [Pg.187]

A salt derived from a hydracid is named according to the nonmetal present in the parent acid, and the salt will end in - ide . The metallic part of the salt is named first. The prefix hydro is dropped and suffix - ic (of the acid) is changed to - ide . HC1 HBr HCN H2S Sodium chloride (NaCl) Magnesium chloride (MgCl2) Potassium bromide (KBr) Zinc bromide (ZnBr2) Sodium cyanide (NaCN) Potassium sulfide (K2S)... [Pg.595]

Ethanol (or methanol), Potassium sulfide See Potassium dithioformate... [Pg.138]

Dining attempted preparation of trimethyl orthoformate, addition of sodium to an inadequately cooled chloroform-methanol mixture caused a violent explosion. See Ethanol (or methanol), Potassium sulfide, above See Sodium methoxide, below... [Pg.150]

Antimony trisulfide, carbon disulfide vapour, chromium(II) sulfide and hydrogen sulfide all ignite in contact with fluorine at ambient temperature, the solids becoming incandescent [1]. Iron(II) sulfide reacts violently on mild warming, and barium sulfide, potassium sulfide or zinc sulfide all incandesce in the gas, as does molybdenum(III) sulfide at 200°C [2],... [Pg.1520]

Potassium sulfide Mellor, 1940, Vol. 8, 434 The pyrophoric sulfide ignites in the oxide. [Pg.1783]

Potassium 4-chloro-3,5-dinitrobenzene-sulfonate, 31, 46 Potassium cyanate, 31, 9 Potassium cyanide, 30,84 32,31,63 37,47 Potassium ethyl malonate, 37, 34 Potassium ethyl xanthate, 30, 56 Potassium fluoride, 36, 40 Potassium iodide, 30, 34 31, 31, 66 Potassium metal, 37, 29, 30 Potassium methyl sulfate, 31, 73 Potassium nitrate, 31, 46 Potassium 1-nitropropylnitronate, 37, 24 Potassium oxalate, 34, 83 Potassium permanganate, 30, 87 31, 59 Potassium sulfide, 32, 103 Potassium thiobenzoate, 32, 101 Potassium thiocyanate, 32, 39, 40 Prins reaction, 33, 72 Propane, 1, 3-dibromo-2, 2-Ws-(bromo-methyl)-, 31, 82... [Pg.53]

Germanium(II) sulfide, 4419 Gold(III) sulfide, 0116 Iron disulfide, 4401 Iron(II) sulfide, 4400 Iron(III) sulfide, 4404 Manganese(II) sulfide, 4706 Manganese(IV) sulfide, 4707 Mercuiy(II) sulfide, 4607 Molybdemun(IV) sulfide, 4719 Potassium sulfide, 4670 Rhenium(VII) sulfide, 4891 Ruthenium(IV) sulfide, 4895 Samarium sulfide, 4899 Silver sulfide, 0026 Sodium disulfide, 4812 Sodium polysulfide, 4813 Sodium sulfide, 4811 Strontium sulfide, 4901 Tantalum(TV) sulfide, 4903... [Pg.258]

Potassium sulfide Solution S s Tannic acid Solution S s... [Pg.230]

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