定性分析化学实验教学体系的现状及发展方向

文章回顾了硫化氢系统定性分析法的形成过程和我国定性分析实验教学的发展现状,针对当前的问题,提出应重新审视所要分析离子的种类和数目、试剂的品种和用量、分离操作的方法和技术、已知液和未知物实验的教学比例、反应时间的控制等因素,并将实验成本、环保理念、多媒体技术和研究性学习等融入新的实验教学体系中,使新体系既能克服“步骤烦琐、课时过多”的弊端,又能保持传统硫化氢系统分析教育功能的特点,使定性分析实验重获新生。

Current Situation and Future Development of the Qualitative Analysis System of Teaching Chemistry Experiment

Based on the forming process of the qualitative analysis of hydrogen sulfide system and the current development of the teaching of chemistry experiment as well as the existing(problems),this paper puts forward some factors to be reconsidered such as the types and numbers of ION analysis,the varieties and doses of reagent,the methods and techniques of separation (operation),the teaching rates of known liquid and unknown objects for experiment and the control of reaction time.Furthermore,it involves the experiment cost,the notion of environmental protection,multimedia technology and research study in the experimental teaching system,producing a new system to (overcome) the weaknesses of "complex procedures and excessive class-hours" and to maintain the educational characteristics of the traditional qualitative analysis of hydrogen sulfide system,thus to renew experiments of qualitative analysis.