NaBr,NaCl和KBr在几种有机溶剂中活度系数的测定

分别测定了NaBr在甲醇、乙醇、正丙醇和异丙醇中，NaCl和KBr在甲醇和乙醇中共8个体系（溶液物质的量的浓度在01 mol·L-1范围内）在29815、31315和32315 K下的电导率，利用Debye Hücker和Osager Falkenhangen 公式计算了以上溶液体系的平均离子活度系数，讨论了浓度和温度对电解质溶液活度系数的影响。其中NaBr 在乙醇中, NaCl在甲醇中和 KBr在甲醇中的平均离子活度系数的计算结果与已发表文献中的数据进行了比较。结果表明，该方法的活度系数结果与文献数据有较好的一致性。 关键词：电解质溶液；电导法；平均离子活度系数；有机溶剂；NaBr； NaCl；KBr

Activity Coefficient Measurement of NaBr,NaCl and KBr in Selected Organic Solvents

In this paper,the conductivities of NaBr in methanol,ethanol,1-propanol,2-propanol,NaCl and KBr in methanol,ethanol system（solution concentration within 0.1 mol.L-1） were determined at 298.15 K,313.15 K and 323.15 K at atmosphere pressure respectively.The mean ion activity coefficients of NaBr,NaCl and KBr in various organic solvents were calculated according to Debye-Hücker limiting law and Onsager-Falkenhangen equations.The effects of concentration and temperature on activity coefficients of electrolyte solutions were discussed.The calculated results were compared with those of NaBr in ethanol,NaCl in methanol and KBr in methanol reported in literature.The results show that the experimental data obtained by conductivity method have good agreement with data in literature.