分布分数计算式推导及应用中的对应性和规律性问题探讨  

Discussion of Correspondence and Regularity Problem in Deriving and Applying Distribution Fraction Calculations

作　　者：肖开提·阿布力孜[1] 阿热依·木拉提 武荣兰[1] Xiao Kaiti Abulizi;Areyi Mulati;Ronglan Wu(Key Laboratory of Oil&Gas Fine Chemicals Ministry of Education&Xinjiang Uyghur Autonomous Region,School of Chemical Engineering and Technology,Xinjiang University,Urumqi 830017,China)

机构地区：[1]新疆大学化工学院,石油天然气精细化工教育部&自治区重点实验室,乌鲁木齐830017

出　　处：《大学化学》2023年第2期233-238,共6页University Chemistry

基　　金：新疆大学“分析化学”金课建设项目(XJU2021JK39);新疆大学国家一流专业建设项目。

摘　　要：酸碱体系中各组分平衡浓度的计算是分析化学教学中的重要知识点之一,其教学效果取决于对分布分数(δ)计算式推导、应用和计算式中各项潜在含义的掌握。在教学中作为重点,其推导和应用既是花费时间又是繁琐复杂的内容。δ在溶液pH、酸碱体系和络合体系中各物种浓度、缓冲容量及滴定误差等的计算方面均有很好的应用。本文探讨在推导和应用过程中启发学生善于发现其中的对应性和规律性,掌握n元酸碱溶液中各物种δ计算式的快速推导和简便应用的方法,可达到激发学生兴趣、加深认知和牢固掌握的教学目的。The calculation of equilibrium concentrations of each component in the acid-base system is a critical knowledge point in teaching analytical chemistry.Its teaching impact depends on the mastery of the derivation,application,and potential meaning of the distribution fraction(δ) formula.The derivation and application of δ as the focus are time-consuming and tedious.δ has good application in calculating the pH,concentration of each species in the acid-base and complex system,buffer capacity,and titration error.In this study,the methods for the rapid derivation and convenient application of δ in n-ary acid-base solutions were examined.The application of this study helps stimulate students’ interest,improve cognition,and enhance understanding.

关 键 词：分析化学 分布分数 分布曲线 酸碱体系 

分 类 号：G64[文化科学—高等教育学] O6[文化科学—教育学]