| 电导法滴定混合酸的终点误差分析 |
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| 引用本文： | 刘凯,余瑜,毛玉凤.电导法滴定混合酸的终点误差分析[J].内江师范学院学报,2012,27(10):47-52. |
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| 作者姓名： | 刘凯 余瑜 毛玉凤 |
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| 作者单位： | 内江师范学院化学化工学院,四川 内江,641100 |
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| 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:Etl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.
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| 关 键 词： | 电导法 滴定 混合酸 终点误差 质子平衡 |
Analysis of the End Point Errors Found in Mixed Acid Titration by Conductivity Method |
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| LIU Kai
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YU Yu
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MAO Yu-feng.Analysis of the End Point Errors Found in Mixed Acid Titration by Conductivity Method[J].Journal of Neijiang Teachers College,2012,27(10):47-52. |
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| Authors: | LIU Kai YU Yu MAO Yu-feng |
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| Institution: | (College of Chemistry& Chemical Engineering,Neijiang NormalUniversity,Neijiang,Sichuan 641100,China) |
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| Abstract: | 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: Et1 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. |
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| Keywords: | conductivity method titration mixed acid end point error proton balance |
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