电导法测定Er(ClO_4)_3在DMF中的活度系数  

Determination of activity coefficient of Er(ClO_4)_3 in DMF with conductivity method

作　　者：陈芳[1] 王卫东[1] 胡珍珠[1] 

机构地区：[1]湖北师范学院化学与环境工程系,湖北黄石435002

出　　处：《宝鸡文理学院学报（自然科学版）》2005年第1期35-37,76,共4页Journal of Baoji University of Arts and Sciences(Natural Science Edition)

基　　金：湖北省教育厅重点科研项目(No. 2004D005);湖北师范学院项目(No. 2003A18)

摘　　要：应用电导法在293～313 K温度范围内测定了Er(ClO4)3在DMF溶剂中的电导率,利用Debye-Hucker和Osager-Falkenhangen公式计算了Er(ClO4)3在DMF溶剂中的平均活度系数,并对电解质溶液的摩尔电导率及活度系数随温度和浓度的变化进行了讨论:Er(ClO4)3溶液的摩尔电导率值随温度升高而增大,随浓度的变化符合Kohlrausch立方根定律;活度系数随溶液浓度的增加而降低;随温度T的变化规律符合关系式:γ土=A+BT,其线性相关系数R=0.996 6～0.999 7.Conductivity of Er(ClO_4)_3 in DMF was determined with conductivity method at temperature range from 293 K to 313 K. The activity coefficient of Er(ClO_4)_3 in DMF was calculated with Debye-Hücker and Osager-Falkenlagen formula, and the effect of temperature and concentration to the mean activity coefficient and the molar conductivity of electrolyte solution have been discussed. The molar conductivity of Er(ClO_4)_3 solution was augmented along with temperature raising, and conforms to Kohlrausch cube root law along with change of concentration. The mean activity coefficien was reducesed along with increase of concentration, and accord with hypotaxis style γ_±=A+BT along with change rule of temperature. The linear correlation of coefficient is R=0.996 6～0.999 7.

关 键 词：电导法 平均活度系数 Er(ClO4)3 DMF 

分 类 号：O645.1[理学—物理化学]