大学化学 >> 2024, Vol. 39 >> Issue (1): 340-350.doi: 10.3866/PKU.DXHX202305077

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GeoGebra用于酸碱滴定曲线精准绘制及滴定终点误差计算

张红医1,2,*(), 何珺瑶1, 石志红1,2   

  1. 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
  • 收稿日期:2023-05-26 录用日期:2023-08-07 发布日期:2023-08-14
  • 通讯作者: 张红医 E-mail:hyzhang@email.com
  • 基金资助:
    2021年河北省课程思政示范课程;河北省研究生教育教学改革研究项目(YJG2023005);河北省研究生教育教学改革研究项目(YJG2023003);河北省教育厅科学研究计划项目(ZD2019089)

Accurate Plotting of Acid-Base Titration Curve and Calculation of Titration Endpoint Errors by GeoGebra

Hongyi Zhang1,2,*(), Junyao He1, Zhihong Shi1,2   

  1. 1 College of Chemistry and Materials Science, Hebei University, Baoding 071002, Hebei Province, China
    2 Teaching Institute for Chemistry, Hebei University, Baoding 071002, Hebei Province, China
  • Received:2023-05-26 Accepted:2023-08-07 Published:2023-08-14
  • Contact: Hongyi Zhang E-mail:hyzhang@email.com

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摘要：

酸碱滴定曲线和滴定终点误差是分析化学课程中酸碱滴定章节的重要教学内容。针对此内容提出了“强模型化、融信息化、增可视化和去公式化”的总教学策略，形成了以电荷平衡关系式、稀释定律和形态分布系数等为底层逻辑的“三步模型法”滴定方程推演过程；采用GeoGebra软件为信息化手段，实现了滴定方程的可视化和数字解。

关键词: 滴定问题模型化, 信息技术课程融入, 规律可视化增强, 去公式化, GeoGebra软件

Abstract:

Both acid-base titration curve and titration end point error are two important teaching contents in the chapter of acid-base titration in analytical chemistry textbook. In view of the above two problems, it is proposed that a new general teaching strategy of 'strengthening of modeling capability, integrating of information technology into analytical chemistry, enhancement of visualization and avoiding of formularization memory'. The strategy is carried out in two steps. Specifically, in the first step, the acid-base titration problem is converted into a mathematic model by means of three underlying logic tools, namely charge balance equation, dilution law and distribution coefficient of species. The building modeling process is referred to as three-step modeling method. In the second step, visualization and digital solution on the built models are realized by the aid of GeoGebra software.

Key words: Modeling of titration problem, Integrating of information technology into course, Enhancing of visualization for regulation, Avoiding of formularization memory, GeoGebra software