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Dissociation Constants of P ‐Nitroanilinium Ion in Tetrahydrofuran‐Water Mixtures at 25° C by Spectrophotometric Measurements
Author(s) -
ElHarakany A. A.,
Ramadan M. Sh.
Publication year - 1984
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.198400048
Subject(s) - chemistry , tetrahydrofuran , dissociation constant , solvent , aqueous solution , dissociation (chemistry) , ion , inorganic chemistry , organic solvent , solvent effects , analytical chemistry (journal) , organic chemistry , engineering , biochemistry , receptor , chemical engineering
A spectrophotometric method has been used for the determination of the dissociation constant of P ‐nitroaniline indicator (which has a charge type A + B 0 ) in various THF‐water solvent mixtures at 25° C . The dissociation constant is found to decrease with the addition of THF which indicates that the basicity of the medium is increased by the addition of the organic solvent. The relative basicity of the medium is compared with other aqueous‐organic solvent mixtures and the trend of decreasing basicity is in the order THF‐H 2 O> DMF‐H 2 O > AN‐H 2 O > HAC‐H 2 O.