Dielectric properties of urea-water mixed solvents and its effect on the second dissociation process of carbonic acid

被引：0
|
作者：
Yang, Jia-Zhen [1 ]
Lu, Dian-Zhen [1 ]
Deng, Min [1 ]
Lui, Jun [1 ]
Li, Hong-Chang [1 ]
Hou, Chao-Jun [1 ]
机构：
[1] Department of Chemistry, Liaoning University, Shenyang 110036, China
来源：
Zeitschrift fur Physikalische Chemie | 1998年 / 205卷 / 02期
关键词：
Dissociation - Carbonates - Solvents - Metabolism - Sodium bicarbonate - Organic acids - Sodium chloride - Carbon dioxide - Dielectric properties - Carbonation - Urea;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The determination of the second dissociation constant of carbonic acid in 10, 15 and 25 mass% urea-water mixed solvents has been made on cell of the type: Pt, H2 (101.325 kPa) | NaHCO3 (m1), Na2CO3 (m2), NaCl (m3), x mass% urea + water | AgCl-Ag at 278.15 to 318.15 K. The dependence of pK2 on temperature: pK2 = A1 + A2/T + A3T. According to thermodynamic relationship and above equation the dissociation enthalpy, and dissociation entropy were determinated. The dielectric constant of 0, 5, 10, 15, 25 mass% urea-water mixed solvents were measured over the range of temperatures involved. The dependence of pK2 on dielectric constant was discussed in term of Beveradge model.
引用
收藏
页码：199 / 209
相关论文
共 50 条
12345