硫酸钴水溶液热力学  

Thermodynamics of Cobalt Sulfate Solution

作　　者：陈洪涛[1] 王琴萍[1] 周丽华[1] 洪梅[1] 邢长宇[1] 吕殿祯[1] 

机构地区：[1]辽宁大学化学系,辽宁沈阳110036

出　　处：《辽宁大学学报（自然科学版）》2003年第3期228-231,共4页Journal of Liaoning University：Natural Sciences Edition

摘　　要：在HCl-CoCO4-H2O体系中,恒定溶液总离子强度为I=0.2、0.4、0.6、0.8、1.0、1.5mol·kg-1,CoSO4在溶液中的离子强度分数恒定为yB=0.00、0.10、0.20、0.30、0.50和0.70条件下,应用经典的电动势方法测定无液体接界电池(A)在278.15～323.15 K温度范围内的电动势: Pt,H2(101.325kPa)|HCl(mA),CoSO4(mB),H2O|AgCl-Ag (A)根据测得电池(A)的电动势数据,计算了混合溶液中HCl的活度系数γA.在溶液中总离子强度保持恒定时(γB=常数),混合溶液中HCl的活度系数logγA对热力学温度的倒数1/T作图是一条直线,拟合偏差均在10-3-10-4数量级.The thermodynamic properties of system HC1 - CoSO4 - H2O was studied by emf measurement in the cells without liquid junction: Pt,H2(101.325 kPa)|HCl(mA),CoSO4(mB),H2O|AgCl-Ag (A) at constant total ionic strength I = 0.2,0.4,0.6,0.8,1.0,1.5 mol · kg-1 and ionic strength fraction of CoSO4 in the mixture yB =0.00,0. 10,0. 20,0. 30,0. 50,0. 70 at different temperatures from 278. 15 -318. 15 K. The activity coefficients of HC1 rA in the solution were determined from cell (A) and lgrA of HC1 is a linear function of the reciprocal of the absolute temperature at constant composition of the mixture.

关 键 词：硫酸钴水溶液 热力学 离子强度 电动势 活度系数 无液接电池 标准氢电极 银-氯化银电极 

分 类 号：O645.164[理学—物理化学]