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溶液是初中化学学习中较难掌握的内容,容易混淆很多概念。实际上学生在生活中总是遇到溶液如糖水、盐水等,教学中如果从学生熟悉的生活实际入手,就会大大降低溶液学习中的难度,很容易建立起学生易混淆的几组概念和稀释的计算。现就教学中如何用“糖水”突破教学难点予以赘述。一、溶液、溶质和溶剂课题1“溶液形成”中从学生熟悉的糖水制作过程说起,学生都知道把糖加水里就做成了糖水,是糖被水溶解了,水能溶解糖,
Solution is more difficult to master junior high school chemistry learning content, easy to confuse a lot of concepts. In fact, students always encounter in life, such as syrup, salt water, teaching from the students familiar with the actual life start, it will greatly reduce the difficulty of solution learning, it is easy to establish several confusing group of students and the concept of Dilution calculation. Now on how to use teaching “sugar ” breakthrough teaching difficult to repeat them. First, the solution, solute and solvent Problem 1 “solution to form ” Speaking from the students familiar with the process of making sugar, students all know that the sugar and water made of sugar, water is dissolved sugar, water can dissolve sugar ,