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