混合溶剂中Ag-AgCl电极标准电极电势的确定及HCl的热力学性质——HCl+异丙醇(10,20％)+水体系278.15～318.15K

Determination of Standard Potential of Ag-AgCl Electrode and Thermodynamic Property of HCl in Solvent Mixtures—The System of HCl+lsopropanol(10, 20wt°)+Water. From 278.15To318.15K.

本文在278.15～318.15K温度范围内测定了Ag-AgCl电极在10和20wt％异丙醇+水混合溶剂中的标准电极电势,根据Pitzer理论计算和讨论了HCl在混合溶剂中的平均活度系数和电离热力学性质。

The standard potentials of Ag-AgCl electrode in water(+10,+20and+30mass percent of isopropanol) were obtained in a cell wilhout liquid junction, standard hydrogen electrode. Was used as reference electrode They were determined at five point temperatures ovev the range 278.15to318.15K. The Debye-Huckel theory and the standard potentials were used to calculate the mean activity coefficients for HCl in the solvents. The results were used to obtain the standard thermodynamic functions for acidic dissociation of HCl in the solvents. On the basis of pitzer theory, a new method of polynomial approximation was proposed in this paper.