| 混合溶剂中标准pH参考值的研究——KHPh(0.05 mol/kg)+KCl+异丙醇+水体系 |
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| 引用本文： | 蒋湘顺,梁春馀,秦美洁.混合溶剂中标准pH参考值的研究——KHPh(0.05 mol/kg)+KCl+异丙醇+水体系[J].高等学校化学学报,1991,12(9):1234. |
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| 作者姓名： | 蒋湘顺 梁春馀 秦美洁 |
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| 作者单位： | 辽宁大学化学系, 沈阳, 110036 |
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| 摘 要： | 应用电动势法在10%、14.93%和20%异丙醇+水混合溶剂中测定了0.05mol/kg邻苯二甲酸氢钾(KHPh)缓冲溶液在278.15～318.15K范围内的标准pH参考值,根据Pitzer理论,提出了确定各离子活度系数的新方法,计算了邻苯二甲酸的第二级热力学解离常数和相应的热力学量。
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| 关 键 词： | 标准pH参考值 邻苯二甲酸氢钾 异丙醇 电离常数 电离热力学 |
| 收稿时间： | 1990-05-16 |
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 |
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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].Chemical Research In Chinese Universities,1991,12(9):1234. |
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| Authors: | Jiang Xiang-shun Liang Chun-yu Qin Mei-jie |
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| Institution: | Department of Chemistry, Liaoning University, Shenyang, 110036 |
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| Abstract: | pH standard 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 K are 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. |
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| Keywords: | Standard pH reference values Potassium hydrogenphthalate Isopropanol Dissociation constant Thermodynamics of dissociation |
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