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New differential techniques for evaluating rate constants and ratios of rate constants. The behaviors of irreversible first‐and pseudo‐first‐order reactions
Author(s) -
Meites Louis,
Meites Thelma
Publication year - 1970
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.550020207
Subject(s) - chemistry , reaction rate constant , thermodynamics , first order , constant (computer programming) , reaction rate , order of reaction , kinetics , mathematics , organic chemistry , quantum mechanics , catalysis , physics , computer science , programming language
A record of the time dependence of the difference between two signals, one proportional to the concentration of a reactant or product in one reaction mixture and the other proportional to the concentration of the same or a corresponding substance in another mixture in which the reaction is initiated at the same time as the first, makes it possible to obtain not only the ratio, but also the individual values, of the rate constants for the two reactions. The effects of the experimental variables on a number of measurable parameters are examined, the errors associated with a number of different ways of evaluating the rate constants and their ratio are discussed, and it is shown how conditions can be selected that should provide values whose precisions compare favorably with those attainable by other techniques.