El-Naggar G A
Chemistry Department, Faculty of Education, (Damanhour Branch) Alexandria University, P.O. Box 426 Ibrahimia, Alexandria 21321, Egypt.
Talanta. 1998 Nov;47(4):1013-20. doi: 10.1016/s0039-9140(98)00183-0.
The First and second dissociation constants of adipic acid were determined by EMF measurements in water/methanol mixtures with 0, 30, 50 and 70 wt% organic cosolvent. Measurements were made at four different temperatures (ranging from 30 to 60 degrees C) using the cell: glass electrode/HCL (m(1)), H(2)L (m(2)), Na(2)CO(3) (m(3))/AgCl ((S)), Ag. The computations of these dissociation constants were based on the method of successive approximation by means of basic programmes. The thermodynamic properties (DeltaG degrees , DeltaH degrees and DeltaS degrees ) for first and second dissociation reactions of the acid under study, were computed, analyzed and discussed in terms of solute-solvent interactions.
通过在含有0、30、50和70 wt%有机共溶剂的水/甲醇混合物中进行电动势测量，测定了己二酸的一级和二级解离常数。使用玻璃电极/HCl（m(1)）、H₂L（m(2)）、Na₂CO₃（m(3)）/AgCl（(S)）、Ag电池，在四个不同温度（30至60摄氏度）下进行测量。这些解离常数的计算基于通过基本程序的逐次逼近法。根据溶质-溶剂相互作用，对所研究酸的一级和二级解离反应的热力学性质（ΔG°、ΔH°和ΔS°）进行了计算、分析和讨论。
