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电动势法测定混合电解质CsBr+NaBr+H_2O体系的活度系数 被引量:1

Electromotiye force measurements of activity coefficients for the ternary system(CsBr+NaBr+H_2O)
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摘要 采用电池Cs-ISE∣CsBr(mA),NaBr(mB)∣Br-ISE测定了298.15K温度下CsBr+NaBr+H2O体系在离子强度I=0.01~1.00mol/kg范围内,离子强度分数yB=0,0.25,0.50和0.75时的电动势,实验结果分别用Pitzer方程和Harned经验公式进行拟合,得到该体系的Pitzer二离子、三离子相互作用参数和Harned参数.拟合结果表明,Pitzer方程和Harned经验公式均能理想地适用于该三元盐水体系. Activity coefficients of the ternary system (CsBr + NaBr 4-H2O) were determined by electromotive force (EMF) measurements using the cell. Cs-ion selective electrode(ISE) | CsBr (mA), NaBr (mB) | Br-ion selective electrode(ISE) at 298.15 K, and over total ionic strengths from range 0.01 to 1.0 mol/kg for different ionic strength fractions (0.25, 0.5 and 0.75). The experimental data were satisfactorily described via the Pitzer and Harned models. The Pitzer binary and ternary ionic interaction parameters and the Harned parameters have also been calculated.
出处 《陕西师范大学学报(自然科学版)》 CAS CSCD 北大核心 2013年第2期49-53,共5页 Journal of Shaanxi Normal University:Natural Science Edition
基金 国家自然科学基金资助项目(21171111) 中央高校基本科研业务费专项资金项目(GK201001006)
关键词 电动势法 CsBr 活度系数 PITZER方程 Harned经验公式 electromotive force(EMF) measurements CsBr activity coefficient pitzer model Harned model
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