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Alternatively, various numerical formulas have been proposed including pK a = 8 − 5m (known as Bell's rule), [29] [47] pK a = 7 − 5m, [30] [48] or pK a = 9 − 7m. [29] The dependence on m correlates with the oxidation state of the central atom, X: the higher the oxidation state the stronger the oxyacid.
In physical chemistry, the Arrhenius equation is a formula for the temperature dependence of reaction rates.The equation was proposed by Svante Arrhenius in 1889, based on the work of Dutch chemist Jacobus Henricus van 't Hoff who had noted in 1884 that the Van 't Hoff equation for the temperature dependence of equilibrium constants suggests such a formula for the rates of both forward and ...
All thermodynamic data is a non-linear function of temperature (and pressure), but there is no universal equation format for expressing the various functions. Here we describe a commonly used polynomial equation to express the temperature dependence of the heat content. A common six-term equation for the isobaric heat content is:
Hexafluoroisopropanol, commonly abbreviated HFIP, is the organic compound with the formula (CF 3) 2 CHOH. This fluoroalcohol finds use as solvent in organic chemistry. [1] Hexafluoro-2-propanol is transparent to UV light with high density, low viscosity and low refractive index. It is a colorless, volatile liquid with a pungent odor.
Chloroform, [10] or trichloromethane (often abbreviated as TCM), is an organochloride with the formula C H Cl 3 and a common solvent.It is a volatile, colorless, sweet-smelling, dense liquid produced on a large scale as a precursor to refrigerants and PTFE. [11]
DEA List I chemical status [ edit ] Because hypophosphorous acid can reduce elemental iodine to form hydroiodic acid , which is a reagent effective for reducing ephedrine or pseudoephedrine to methamphetamine , [ 11 ] the United States Drug Enforcement Administration designated hypophosphorous acid (and its salts) as a List I precursor chemical ...
Phenoxyacetic acid is a white or clear crystalline compound at room temperature. [2] When impure, it can appear to be a light tan to brown. The compound has a solubility in water of 12 g/L and is highly soluble in organic solvents including ethanol, diethyl ether and benzene. Phenoxyacetic acid is a weak acid and weak base with a pKa of 3.7. [1 ...
Potassium tert-butoxide (or potassium t-butoxide) is a chemical compound with the formula [(CH 3) 3 COK] n (abbr. KOtBu). This colourless solid is a strong base (pKa of conjugate acid around 17), which is useful in organic synthesis. The compound is often depicted as a salt, and it often behaves as such, but its ionization depends on the ...