The acidity functionsH 0 s of HCl solutions in EtOH with low water content |
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Authors: | I. S. Kislina M. Yu. Kulikova S. G. Sysoeva O. N. Temkin |
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Affiliation: | (1) N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, 4 ul. Kosygina, 117977 Moscow, Russian Federation;(2) M. V. Lomonosov Institute of Fine Chemical Technology, 86 prosp. Vernadskogo, 117571 Moscow, Russian Federation |
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Abstract: | The acidity functionsH0s of HCl solutions in EtOH-H2O solvents containing 1.09, 3.0, and 5.0% water have been measured at 25 and 40 °C by the indicator method. The concentration of HCl changes from 10–2 to 36m. Nitroanilines, for which a protonation mechanism is realized in the studied systems, were used as indicators.For each solvent,H0s is temperature independent atmHCl < 4, and acidity atmHCl > 4 mol L–1 increases more rapidly at 25 °C than at 40 °C. The acidity functions of aqueous and water-ethanol solutions of HCl were compared, and the concentrations of proton solvates of different compositions and their relative protonating ability were evaluated.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 1722–1725, October, 1994.This work was financially supported by the Russian Foundation for Basic Research (Project No. 93-03-18356). |
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Keywords: | acidity indicator method hydrochloric acid ethanol water |
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