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Potassium hydrosulfide is an inorganic compound with the formula KSH. This colourless salt consists of the cation K + and the bisulfide anion [SH] −. It is the product of the half-neutralization of hydrogen sulfide with potassium hydroxide. The compound is used in the synthesis of some organosulfur compounds. [1]
Entomologists wishing to study the fine structure of insect anatomy may use a 10% aqueous solution of KOH to apply this process. [24] In chemical synthesis, the choice between the use of KOH and the use of NaOH is guided by the solubility or keeping quality of the resulting salt.
For example, 50 g of zinc will react with oxygen to produce 62.24 g of zinc oxide, implying that the zinc has reacted with 12.24 g of oxygen (from the Law of conservation of mass): the equivalent weight of zinc is the mass which will react with eight grams of oxygen, hence 50 g × 8 g/12.24 g = 32.7 g.
The hydroxyl value can be calculated using the following equation. Note that a chemical substance may also have a measurable acid value affecting the measured endpoint of the titration. The acid value ( AV ) of the substance, determined in a separate experiment, enters into this equation as a correction factor in the calculation of the hydroxyl ...
Sodium bisulfite (or sodium bisulphite, sodium hydrogen sulfite) is a chemical mixture with the approximate chemical formula NaHSO 3.Sodium bisulfite is not a real compound, [2] but a mixture of salts that dissolve in water to give solutions composed of sodium and bisulfite ions.
It can be produced by heating K 2 SO 4 with carbon : K 2 SO 4 + 4 C → K 2 S + 4 CO. In the laboratory, pure K 2 S may be prepared by the reaction of potassium and sulfur in anhydrous ammonia. [4] Sulfide is highly basic, consequently K 2 S completely and irreversibly hydrolyzes in water according to the following equation: K 2 S + H 2 O → ...
Chronic exposure tests with C 12 to C 18 with the invertebrate Ceriodaphnia dubia found the highest toxicity is with C 14 (NOEC was 0.045 mg/L). In terms of thermal stability, alkyl sulfates degrade well before reaching their boiling point due to low vapor pressure (for C 8-18 from 10-11 to 10-15 hPa). Soil sorption is proportional to carbon ...
Potassium silicate can be synthesized in the laboratory by treating silica with potassium hydroxide, according to this idealized equation: nSiO 2 + 2 KOH → K 2 O·nSiO 2 + H 2 O. These solutions are highly alkaline. Addition of acids causes the reformation of silica. K 2 SiO 3 adopts a chain or cyclic structures with interlinked SiO 2− 3 ...