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用讨论式进行课堂教学,这一点我在大一《无机化学》氮族元素的教学中作了初步尝试。讨论的题目是“为什么浓硝酸的氧化性比稀硝酸的强?你可用哪些学过的知识来解释并证明之?”现对讨论题的具体内容分析之。 讨论题的内容: 以学生中学习过的知识为基础,难易适度、内容具体、学生感兴趣,学生知道硝酸是一种氧化性酸,当硝酸作氧化剂和金属反应时,其还原产物视硝酸的浓度和金属的活泼性而异,浓硝
In classroom teaching with discussion styles, I made a preliminary attempt in the teaching of nitrogen elements in freshman’s inorganic chemistry. The discussion topic is “Why is the concentrated nitric acid more oxidizing than dilute nitric acid? What lessons can you use to explain and prove this?” The content of the discussion questions: Based on the knowledge learned in the students, the difficulty is moderate, the content is specific, and the students are interested. The students know that nitric acid is an oxidizing acid. When nitric acid is used as an oxidant and metal reacts, the reduced product is considered as nitric acid. Concentration and Concentration of Concentration