论文部分内容阅读
熟背定义并不等于真正理解概念,更不等于能正确使用概念,解决具体问题.如学习电解质后,有的学生认为P_2O_5是电解质,因其水溶液导电;有的认为无水硫酸不是电解质,因其不导电.这两种错误的认识,就是因为没有理解电解质的本质特征.因此,我在教学这一内容时,特别向学生指出:(1)导电性是电解质突出特征.其本质特征应该说是电离;(2)电离过程需要外因条件的配合,不是任意
The definition of cooked back does not mean that people really understand the concept, but it does not mean that they can correctly use the concept and solve specific problems. After studying electrolytes, some students think that P_2O_5 is an electrolyte because of its conductive water solution; some think that anhydrous sulfuric acid is not an electrolyte. It is not electrically conductive. These two kinds of erroneous recognitions are due to the lack of understanding of the essential characteristics of electrolytes. Therefore, when teaching this content, I pointed out specifically to students: (1) Conductivity is an electrolyte salient feature. Its essential characteristics should be stated Is ionization; (2) ionization process requires the cooperation of external conditions, not arbitrary