【摘要】 在HCl-NiSO4-H2 O混合溶液中 ,以标准氢电极和银—氯化银电极组成无液接电池 ,恒定溶液总离子强度I和NiSO4在溶液中的离子强度分数yB 的条件下 ,在 2 78 1 5～ 3 2 3 1 5K温度范围内测定下列电池的电动势Pt,H2 ( 1 0 1 3 2 5kPa) |HCl(mA) ,NiSO4(mB) ,H2 O|AgCl-Ag由于体系存在硫酸的二级解离 ,应用数学迭代方法确定平衡体系氢离子的浓度 ,计算了混合溶液中HCl的活度系数γA,结果表明 ,在溶液总离子强度保持恒定时 ,HCl的活度系数服从Harned规则。在溶液组成恒定时 ,盐酸的活度系数logγA 对热力学温度l/T作图 ,是一条直线更多还原

【Abstract】 The thermodynamic properties of the system HCl-NiSO₄-H₂O was studied by emf measurements in the cells without liquid junction: Pt,H₂（101.325kPa）｜HCl（m_A）,CoSO₄（m_B）,H₂O｜AgCl-Ag（A） at constant total ionic strength of solution I=0.4、0.6、0.8、1.0、1.5、2.0 mol·kg^-1 and ionic strength fraction of NiSO₄ in the mixture y_B=0.00、0.10、0.20、0.30、0.50、0.70 at different temperatures from 278.15 to 318.15K.The activity coefficients of HCl in the solution have been determined from cell（A）.The results show that the activity coefficient of HCl in the solutions still obey Harned’s rule and lgγ_A of HCl is a linear function of the absolute temperature at constant composition of the mixture.更多还原