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南昌市二中余玉发老师认为: 在化学课的教学中,要对学生进行必要的逻辑训练。他说:形式逻辑与辩证逻辑是人们观察社会、分析事物的一般思维方法,但学生这方面的索养很差。例如对下面的两题,学生如果没有掌握“划分”这一逻辑方法,概念不明确,也就不能作出正确的判断与推理。(1)饱和溶液就是浓溶液,不饱和溶液就是稀溶液,这种说法是否正确?给予说明;(2)硫酸钙与碳酸钙一类难溶盐也就是难电离的物质,这种说法是否正确?给予说明。这两题,有的学生不以为错,反以为对。有的虽然认为说法有错误,
Teacher Yu Yufa of the Second Middle School of Nanchang City believes that: In the teaching of chemistry classes, students must perform the necessary logical training. He said: Formal logic and dialectical logic are common ways of thinking for people to observe society and analyze things. However, students’ support in this area is very poor. For example, for the following two questions, if students do not master the logical method of “division”, the concept is not clear, and they cannot make correct judgments and inferences. (1) Saturated solution is a concentrated solution, unsaturated solution is a dilute solution, this statement is correct? Give instructions; (2) calcium sulfate and calcium carbonate is a type of refractory salt is difficult to ionize the substance, this statement is correct Give instructions. These two questions, some students do not think wrong, think right. Some believe that there are mistakes