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Studies on the Equilibria of α‐Phthalic and Phosphoric Acids in Mixed Methanol — Water Mixture (50% w/w)
Author(s) -
Azab H. A.,
Hassan Ahmed
Publication year - 1989
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.198900056
Subject(s) - chemistry , methanol , phosphoric acid , phthalic acid , dissociation constant , ionic bonding , dissociation (chemistry) , inorganic chemistry , thermodynamics , organic chemistry , ion , biochemistry , physics , receptor
The secondary dissociation constants of α‐phthalic and phosphoric acids have been determined in 50% w/w methanol‐water mixture from the e.m.f measurements of the cell of the type: Pt; H 2 (1 atm), M 2 A(m), MHA(m), MCl, AgCl; Ag at different temperatures (288.15–308.15 K) and at different ionic strengths. The thermodynamic values ΔG°, ΔH°, ΔS° for the respective equilibria are estimated. The possibility of using these acids as basis for some buffer solutions in 50% methanol – water mixture is discussed.