基于问题解决能力培养的酸碱滴定实验设计  

Acid-base Titration Based on Students’Ability Training of Problem Solving

作　　者：刘梅[1,2] 朱鹏飞[1,2] 原佳露 邱阳[2] LIU Mei;ZHU Pengfei;YUAN Jialu;QIU Yang(National Demonstration Center for Experimental Chemistry and Chemical Engineering Education,Southwest Petroleum University,Chengdu 610500,China;School of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]西南石油大学化学化工国家级实验教学示范中心,成都610500 [2]西南石油大学化学化工学院,成都610500

出　　处：《实验科学与技术》2022年第3期82-86,共5页Experiment Science and Technology

基　　金：中国高教学会高等教育科学研究“十三五”规划课题(2019SYSYB15);西南石油大学实验教学方法改革研究项目(2019)。

摘　　要：以培养学生的问题解决能力为导向,对酸碱滴定实验“混合碱的组分和含量的测定”进行了实验内容与教学过程的综合设计。实验从“如何提高测定结果的准确性”这一问题出发,改革实验内容,先对碱液成分进行初步鉴定,再根据双指示剂法的基本原理,引入分光光度法,探讨了酚酞用量对第一终点颜色的影响规律,并以对照色为终点颜色的参考对试样进行成分和含量的测定。与一般的验证性实验相比,其内容更充实,综合性更高,挑战性与趣味性更强。另外,以探究问题为线索,以解决问题为目标,从“课前、课中、课后”3个环节对该实验进行了教学设计,培养学生的知识应用与迁移能力及问题解决能力。Based on the problem-solving-oriented principle,there comes to a comprehensive design with an integration of experiment content and teaching process when doing the experiment of determining composition and content in mixed alkali,one part of the acid-base titration experiment.Started form the problem“how to get the accuracy results of the composition and content in the mixed alkali”,the composition in alkali sample is analyzed primarily at first,then according to the principle of double-tracer technique,the rule of how phenolphthalein amount influences the color of the primary endpoint is studied by spectrophotometry method.At last,the composition and content in mixed alkali sample are measured with the controlled color as a reference of the end-point color.Compared to other common verification experiment,this experiment is substantial in content,comprehensive,challenging and interesting.In addition,the teaching process of this experiment with the exploring problem as the clue and solving problem as the goal is designed throughout“before,in and after lessons”parts.This teaching design emphasizes the training of students’problem solving ability and their knowledge migration and application skill.

关 键 词：问题解决能力 酸碱滴定 实验设计 实验教学 

分 类 号：G642.0[文化科学—高等教育学]