水－醋酸体系中HCl的活度系数与Pitzer参数

Activity Coefficients and Pitzer’s Parameters of HCl in H2O-HAc Mixtures

运用氢玻璃电极与氯离子膜电极，测定了２９８．２Ｋ下电池（Ｈ＋）玻璃电极｜ＨＣｌ（ｍ），ＮＡｃ（Ｗ）＋Ｈ２Ｏ（１－Ｗ）｜（Ｃｌ－）膜电极的电动势，并求得了ＨＣｌ浓度分别为ｍ＝０．０１０，０．０２０，０．０４０，０．０６０，０．０８０，０．１００，０．１２０时在不同组成（１０％～９０％）的水－醋酸混合溶剂中的平均活度系数，进而通过多元线性拟合，求得了ＨＣｌ在不同组成溶剂中的Ｐｉｔｚｅｒ参数β０、β１、Ｃφ。最后对数据处理方法及结果进行了讨论。

By using selective ion electrodes,an EMF measurement is made of the cell glass(H+)|HCl(m),HAc(W)+H2O(1-W)|membrane(Cl-)in a series of HAc-H2O mixtures.The averaged activity coefficients of HCl with the different concentrations such as 0.010,O.020,O.040,O.060,O.080,0.100 and 0.120 mol/kg-solvent are evaluated,and the Pitzer’s parameters β0,β1 and Cφ are obtained as the best fitting coefficients by using the three-parameter-pitzer’s e-quatuin.The date processing aid it results are briefly dealt with.