Chem. J. Chinese Universities ›› 1991, Vol. 12 ›› Issue (9): 1234.
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Jiang Xiang-shun, Liang Chun-yu, Qin Mei-jie
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Abstract: pHstandard reference values, pH(RVS), for 0. 05 mol/kg potassium hydrogen phthalate buffer solutions in 10%, 14. 93% and 20% isopropanol+ water mixed solvents at temperatures from 278. 15 to 318. 15 Kare determined from reversible electromotive potential measurements of the cell without a liquid junction. On the basis of Pitzer's theory, a new method for determining the activity coefficients of each ion in the solutions is proposed. The second thermodynamic dissociation constants of v-phthalic acid are calculated, and the thermodynamic quantities of the second dissociation are calculated and the results are discussed.
Key words: Standard pH reference values. Potassium hydrogenphthalate, Isopropanol. Dissociation constant, Thermodynamics of dissociation
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Jiang Xiang-shun, Liang Chun-yu, Qin Mei-jie. Studies on Standard pH Reference Values in Mixed Solvents--The System of KHPh(0. 05 mol/kg)+KCl+Isopropanol+Water from 278. 15 to318. 15 K[J]. Chem. J. Chinese Universities, 1991, 12(9): 1234.
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http://www.cjcu.jlu.edu.cn/EN/Y1991/V12/I9/1234