滴定分析中常见的误差及其对分析结果的影响  

Common Errors in Titration Analysis and Effects on Analysis Results

作　　者：李爱峰[1] 李霞[1] 李海波 薛庆旺 LI Ai-feng;LI Xia;LI Hai-bo;XUE Qing-wang(College of Chemistry and Chemical Engineering,Liaocheng University,Shandong Liaocheng 252000,China)

机构地区：[1]聊城大学化学化工学院,山东聊城252000

出　　处：《广州化工》2024年第2期162-165,共4页GuangZhou Chemical Industry

基　　金：山东省化学教指委教学改革研究项目(SDHX-ZD-2022-12、SDHX-YB-2022-21);聊城大学本科教学改革项目(G202021、G202060)。

摘　　要：滴定分析中不可避免地存在各种误差,绝大多数误差会对分析结果造成一定的影响。然而,不少同学对误差的判定感到难以理解,经常得到错误的结论。为了帮助学生理解误差产生的根本原因,正确分析误差对分析结果的影响,本文结合实例根据滴定分析中误差产生的原因对误差进行了分类(主要包括由终点指示方式、试剂及分析人员的操作引起的误差),并结合公式对于误差对分析结果造成的影响进行了分析。There are various errors in titration analysis inevitably,and most of the errors will have a certain impact on the analysis results.However,the judgment of the errors is difficult for many students which often leads to the wrong conclusion.To help students to understand the root cause of the errors and correctly analyze the impact on the analysis results,the errors were classified according to the cause of the errors,including the end point indication mode,the analytical reagents used in analysis and the operation of the analysts.Moreover,the impact on the analysis results was also analysed based on the formulas.

关 键 词：滴定分析 误差 指示剂 电位法 试剂 操作 

分 类 号：O6-041[理学—化学]