摘要
以质子平衡为基础,探讨了电导法滴定强酸与弱酸混合体系的终点误差及影响因素,并对终点的确定方法提出了相关的改进.研究表明:Et1受滴定剂和强酸浓度的影响较大;Et2则受被测物浓度和弱酸的解离常数的影响较大.采用每段半程画线的处理方法比用传统的每段全程画线更加准确.
On the basis of proton balance, the end point error of strong and weak acid mixture systems and its influencing factors were discussed from data of conductivity method titration. At the same time, corresponding improvements have been made in the method of end point determination. The results show that： Et2 is greatly influenced by titrant and the concentration of strong acid; Et2 is greatly influenced by the concentration of measured object and dissociation constant of the weak acid. The method of drawing a line halftime of the process is more precise than the method of drawing a line throughout the process.
出处
《内江师范学院学报》
2012年第10期47-52,共6页
Journal of Neijiang Normal University
关键词
电导法
滴定
混合酸
终点误差
质子平衡
conductivity method
titration
mixed acid
end point error
proton balance
