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Citation: Hongyi Zhang, Junyao He, Zhihong Shi. Accurate Plotting of Acid-Base Titration Curve and Calculation of Titration Endpoint Errors by GeoGebra[J]. University Chemistry, ;2024, 39(1): 340-350. doi: 10.3866/PKU.DXHX202305077 shu

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

Hongyi Zhang ^1,2,, ,
Junyao He ¹ ,
Zhihong Shi ^1,2

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

Corresponding author: Hongyi Zhang, hyzhang@email.com
Received Date: 26 May 2023

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.
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