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本文在恒定异丙醇摩尔分数x=0.05的条件下,应用电动势法测定无液体接界电池(A)和电池(B)的电动势:Pt,H_2(latm)|HCl(m),2-propanol(x),H_2O(1-x)|Agcl-Ag(A)和Pt,H_2(latm)|HCl(m_A),NaCl(m_B),2-propanol(x),H_2O(1-x)|AgCl-Ag(B)根据电池(A)电动势确定混合溶剂中的Ag-AgCl电极的标准电极电势,讨论了HCl的迁移性质;利用电池(B)电动势确定HCl在该体系中的活度系数γA,在恒定总离子强度下,HCl的活度系数遵守Harned规则。在溶液组成恒定时,logγA是温度倒数1/T的线性函数,讨论了混合物中HCl的相对偏摩尔焓,计算了HCl的一级、二级和总介质效应。
In this paper, electromotive force method was used to determine the electromotive force of non-liquid junction cell (A) and cell (B) under the condition of constant isopropanol mole fraction x = 0.05: Pt, (x) and H_2O (1-x) | Agcl-Ag (A) and Pt, H_2 (latm) -Ag (B) The standard electrode potential of the Ag-AgCl electrode in the mixed solvent was determined based on the electromotive force of the battery (A), and the migration property of HCl was discussed. The activity coefficient of HCl in the system was determined by the electromotive force of the battery (B) At constant total ionic strength, the activity coefficient of HCl obeys the Harned rule. When the solution composition is constant, logγA is a linear function of the reciprocal of temperature 1 / T. The relative partial molar enthalpies of HCl in the mixture are discussed and the primary, secondary and total medium effects of HCl are calculated.