The Improvement of the Experiment Items pKa Determination of Binary Organic Acid based on Analysis of Organic Acid and Potentiometric Titration of Acetic Acid
Analysis of organic acid and potentiometric titration of acetic acid were chosen as experiment item in Analytical chemistry laboratory course.The experiment content is simple and the number of experimental instruments is insufficient,so the innovative design and improvement have been carried out in this paper.Combined with the scientific research results,the whole process tracking of potentiometric titration determination of pKa was improved to three-point determination,which saved the time of using the instrument,realized the independent experiment of students and shared experimental instruments,and solved the problem of insufficient number of instrument sets.Design based on the basic concept,principle,and calculation and reasoning,which induced the binary organic weak acid concentration and the determination of pKa was realized.So the disconnection phenomenon between theory and experiment and the problem of the theory and application were solved.The difficulty,degree of challenge and creativity were improved in the course of the experiment teaching and studying,which induced the student sense of learning attitude was inspired.
pKa Determineoptimization and Improvementdifficultychallenge and Innovationpractice and application
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