| 用电势法测定混合电解质溶液中各个组分的活度系数 |
| |
| 引用本文： | 闫卫东,刘卫东,韩世钧.用电势法测定混合电解质溶液中各个组分的活度系数[J].高校化学工程学报,1994(1). |
| |
| 作者姓名： | 闫卫东 刘卫东 韩世钧 |
| |
| 作者单位： | Department of Chemistry，Zhejiang University |
| |
| 基金项目： | 国家教委博士点基金,浙江省自然科学基金 |
| |
| 摘 要： | 本文用无液接电势电池：Ｎａ－ＩＳＥ（或Ｋ－ＩＳＥ）｜（ＮａＣｌ（ｍＡ），ＫＣｌ（ｍＢ），Ｈ２Ｏ｜Ｃｌ－ＩＳＥ同时测定了２９８．１５Ｋ，溶液离子强度Ｉ：０．１、０．５、１．０、１．５、２．０和２．５ｍｏｌ／ｋｇ时，钠电极与氯电极组成的电池和钾电极与氯电极组成的电池的可逆电势值，根据Ｎｅｒｎｓｔ方程分别求出ＮａＣｌ－ＫＣｌ－Ｈ２Ｏ体系中，ＮａＣｌ和ＫＣｌ的平均活度系数。用Ｐｉｔｚｅｒ方程拟合两套实验数据，求出两套基本一致的Ｐｉｔｚｅｒ混合参数θＮａ－Ｋ和。将混合参数代回Ｐｉｔｚｅｒ方程，分别求出另一组分的平均活度系数，计算值与实验值比较，标准偏差分别为：０．００８１（ＮａＣｌ）和０．００７３（ＫＣｌ）。
|
| 关 键 词： | 混合电解质溶液，活度系数，Pitzer方程，电势法 |
Measurement of Components Activity Coefficients of Mixed Electrolyte by EMF Method |
| |
| Yan Weidong, Liu Weidong, Han Shijun.Measurement of Components Activity Coefficients of Mixed Electrolyte by EMF Method[J].Journal of Chemical Engineering of Chinese Universities,1994(1). |
| |
| Authors: | Yan Weidong Liu Weidong Han Shijun |
| |
| Abstract: | The electromotive force of a galvanic cell composed of Na-glass electrode (or potassium ion-selective electrode)-chioride ion-selective electrode pair dipping in a mixed aqueous solution of NaCl and KCI were measured at total ionic strength of 0.1,0.5. 1. 0 , l. 5 ,2. 0 and 2. 5 moles/kg and 298. 15K. By using the Nernst equation and measured EMF data,the corresponding activity coefficients of the electrolyte components were calculated. The obtained activity coefficients were well correlated by Pitzer equation, and the corresponding Pitzer parameters and interaction parameters were obtained. The activity coefficient data calculated from correlated equation were in good agreement with the experimental results. |
| |
| Keywords: | Mixed-electrolyte solution Activity coefficient Pitzer equation EMF method |
| 本文献已被 CNKI 等数据库收录！ |
