摘要
以标准氢电极和银-氯化银电极组成无液接电池,研究HCl-NiSO4-H2O体系.在恒定溶液总离子强度I=0.4、0.6、0.8、1.0、1.5、2.0mol·kg-1,NiSO4在溶液中的离子强度分数yB=0.00、0.10、0.20、0.30、0.50、0.70的条件下,在278.15～323.15K温度范围内测定电池:Pt,H2(101.325kPa)│HCl(mA),NiSO4(mB),H2O│AgCl-Ag的电动势.根据测得的电动势数据,考虑到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,进而计算了混合溶液中HCl的活度系数γA.结果表明,在溶液中总离子强度保持恒定时,HCl的活度系数服从Harned规则.
The thermodynamic properties of HCl -NiSO 4 -H 2 O system was studied by EMF measureme nt in the cells without liquid junction:Pt,H 2 (101.325kPa)│HCl (m A ),NiSO 4 (m B ),H 2 O│AgCl-Ag (A)at certain total ionic strength I=0.4?0.6?0.8?1.0?1.5?2.0mol ·kg -1 with various ionic strength fractio ns of NiSO 4 y B =0.00?0.10?0.20?0.30?0.50?0.70at different temperatures from278.15～323.15K .The activity coefficients of HCl γ A in the solution have been calculated from EMF of cell(A).The results show that the activi-ty coefficients of HCl in the solutio ns still obey Harned's rule.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2004年第2期186-190,共5页
Acta Physico-Chimica Sinica
基金
辽宁省自然科学基金(9810300902)资助项目~~
