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Kinetics of malachite green fading in water–ethanol–2‐propanol ternary mixtures
Author(s) -
Samiey Babak,
Motamedi Laila
Publication year - 2011
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.20543
Subject(s) - chemistry , malachite green , ternary operation , reaction rate constant , propanol , hydroxide , ethanol , alcohol , fading , analytical chemistry (journal) , kinetics , nuclear chemistry , inorganic chemistry , chromatography , organic chemistry , telecommunications , physics , decoding methods , adsorption , quantum mechanics , computer science , programming language
The rate constant of malachite green (MG + ) alkaline fading was measured in water–ethanol–2‐propanol ternary mixtures. This reaction was studied under pseudo‐first‐order conditions at 283–303 K. It was observed that the observed reaction rate constants, k obs , were increased in the presence of different weight percentages of ethanol and 2‐propanol. The fundamental rate constants of MG + fading in these solutions were obtained by using the SESMORTAC model. In each series of experiments, the concentration of one alcohol was kept constant and the concentration of the second one was changed. It was observed that at the constant concentration of one alcohol and variable concentrations of the second one, with an increase in temperature, k 2 values decrease according to the trend of hydroxide ion nucleophilic parameter values and k 1 values increase. © 2011 Wiley Periodicals, Inc. Int J Chem Kinet 43: 441–453, 2011