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在苏教版普通高中课程标准实验教科书化学2(必修)“微粒之间的相互作用力”一节中,我们都会提到离子化合物和共价化合物实验区别的方法:熔融状态下是否导电(能导电的为离子化合物,不能导电的为共价化合物),但学生对此很难理解,因此使之成为中学化学疑难问题之一。究其原因有:一是微观粒子无法看见;二是这个实验停留在口头上,学生只听其声,不见其形。如何解决学生的疑难问题呢?课后笔者进行了精心设计,在设计中结合了笔者所
In the Sujiao version of the general high school curriculum standard experimental textbook chemistry 2 (compulsory) “Particle interaction ” section, we will mention the ionic compounds and covalent compounds experimental distinction: whether the conductive state in the melt (Can be conductive for the ionic compounds, can not conduct electricity for the covalent compounds), but students are difficult to understand, making it difficult to solve high school chemistry one of the problems. The reason is: First, the microscopic particles can not see; Second, the experiment stays in the verbal, students only listen to their voices, but not its shape. How to solve the difficult problem of students? After class I conducted a well-designed, combined with the author in the design