分析化学教学中引入动态缓冲容量“去公式化”计算的新策略  

A New Strategy for“De-formulized”Calculation of Dynamic Buffer Capacity in Analytical Chemistry Education

作　　者：张红医[1,2] 石志红 张志军 Hongyi Zhang;Zhihong Shi;Zhijun Zhang(College of Chemistry and Materials Science,Hebei University,Baoding 071002,Hebei Province,China;Teaching Institute for Chemistry,Hebei University,Baoding 071002,Hebei Province,China;Cangzhou Risun Chemicals Co.,Ltd.,Cangzhou 061113,Hebei Province,China)

机构地区：[1]河北大学化学与材料科学学院,河北保定071002 [2]河北大学化学教学研究所,河北保定071002 [3]沧州旭阳化工有限公司,河北沧州061113

出　　处：《大学化学》2024年第3期390-394,共5页University Chemistry

基　　金：2021年河北省课程思政示范课程;材料化学国家一流专业(YS23-YLZY-021);河北省研究生教育教学改革研究项目(YJG2023005,YJG2023003)。

摘　　要：缓冲容量是分析化学重要内容。目前教材中缓冲容量计算没有考虑缓冲溶液与样品溶液混合时体积的变化,这种不考虑体积变化的缓冲容量被称为“静态”缓冲容量。而在实际应用中,往往缓冲溶液与样品溶液混合后的体积远远大于缓冲溶液的原始体积,此时需要考虑“动态”缓冲溶液。这里提出了一种“动态”缓冲容量问题的“去公式化”解决方案,它完全基于学科思想的底层逻辑,不会增加学生学习的记忆负担。Buffer capacity is an important concept in analytical chemistry.Conventional calculations often neglect volume changes that occurs when a buffer solution mixes with a sample solution,yielding what is termed“static”buffer capacity.In practical applications,however,the volume of the buffer solution mixed with the sample solution is often substantially greater than the original volume of the buffer solution,therefore necessitating the consideration of“dynamic”buffer capacity in textbook.This paper proposes a“de-formulized”strategy for addressing“dynamic”buffer capacity problem,which is completely based on the underlying logic of the discipline.This approach avoids adding to the memorization burden of students’learning.

关 键 词：静态缓冲容量 动态缓冲容量 去公式化 GeoGebra软件 

分 类 号：G64[文化科学—高等教育学] O651[文化科学—教育学]