高等学校化学学报

高等学校化学学报 ›› 2005, Vol. 26 ›› Issue (1): 121.

• 研究论文 • 上一篇    下一篇

Pitzer理论在含有机物的HCl-H2SO4-葡萄糖多组分电解质水溶液中的应用

杨家振1, 常晓红1,2, 许维国1, 吕兴梅2   

  1. 1. 辽宁大学化学系,沈阳 110036;
    2. 中国科学院青海盐湖研究所,西宁 810008
  • 收稿日期:2004-01-07 出版日期:2005-01-10 发布日期:2005-01-10
  • 通讯作者: 杨家振(1940年出生),男,教授,博士生导师,从事化学热力学研究.E-mail:jzyanglnu@yahoo.com.cn E-mail:jzyanglnu@yahoo.com.cn
  • 基金资助:

    辽宁省自然科学基金(批准号:20022045);辽宁省教育厅自然科学基金(批准号:9701111031)资助

Application of Pitzer's Theory to Multicomponent Electrolyte HCl+H2SO4+ Glucose Aqueous Solutions Containing Organic Compounds

YANG Jia-Zhen1, CHANG Xiao-Hong1,2, XU Wei-Guo1, LV Xing-Mei2   

  1. 1. Department of Chemistry, Liaoning University, Shenyang 110036, China;
    2. Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China
  • Received:2004-01-07 Online:2005-01-10 Published:2005-01-10

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摘要： 在298.15K,以葡萄糖质量分数(0.15)恒定的葡萄糖+水混合物为溶剂,测定了电池Pt,H2(101.325kPa)|HCl(m1),H2SO4(m2),Glucose(x),H2O(1-x)|AgCl-Ag的电动势.用所得数据确定了H2SO4在该混合溶剂中的二级解离常数(K2)和一级介质效应.用带有中性分子与各离子相互作用项的Pitzer方程表示Owen定义的总介质效应可较好地处理含有机物的多组分电解质水溶液体系,并用此法处理了文献中HCl在各混合溶剂中的活度系数实验数据,确定了HCl与有机物分子相互作用的Pitzer参数.

关键词: 解离常数, Pitzer方程, 介质效应, 葡萄糖, 硫酸

Abstract: The standard second ionization constant of sulfuric acid, K2, in 15% glucose+85% H2O at 298.15 K was determined from the elecromotive force values of cell Pt, H2(101.325 kPa)|HCl(m 1), H2SO4(m2), Glucose(x), H2O(1-x)|AgCl-Ag The medium effect defined by Owen can be indicated as Pitzer's equation including the parameters of binary terms and triple terms for neutral-neutral and neutral-ion interactions. The values of Pitzer's parameters can be determined by fitting the experimental data in this work. In addition, the experimental data of HCl activity coefficient in the organic solvent-water mixture were treated successfully by this method. The results obtained show that Pitzer's theory can be used to illustrate the medium effect.

Key words: Ionization constant, Pitzer's equation, Medium effect, Glucose, Sulfuric acid

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