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在多年的化学教学工作中,我们认识到利用化学学科特点组织复习,可有效地提高复习效率,避免出现陷入题海、劳而无获现象;也可避免学生对化学知识难形成体系,总觉得杂乱无章的现象。下面谈一谈我们是怎样利用化学学科特点组织高考复习的。一、同类问题归一化在化学试题中常常会根据同一知识点,从不同角度、不同层次提出问题,虽然答题的落脚点是同一理论知识,但学生却常常感到无所适从,不知如何回答。根据这一现象,在复习时可把某一知识内容系统化、归一化。如溶液中各种离子浓度大小的比较、各种平衡、守恒关系是高考的热点,也是教学的难点。这样在教学中就可给学生建立如下溶液中的各种关系:
In many years of chemistry teaching work, we recognize that the use of chemical disciplines to organize review, which can effectively improve the efficiency of review, to avoid falling into the sea, labor without the phenomenon; also avoid the formation of chemical knowledge of students is difficult, always feel Disorganized phenomenon. Here to talk about how we use the chemical characteristics of college entrance examination reviews. First, the normalization of similar problems In chemical tests are often based on the same point of knowledge, from different angles and at different levels to ask questions, although the answer is based on the same theoretical knowledge, but students often feel confused, I do not know how to answer. According to this phenomenon, a knowledge content can be systematized and normalized during the review. Such as the concentration of various ions in solution size comparison, a variety of balance and conservation is the hot college entrance examination, teaching is also difficult. This teaching in the students can be established as the following relationships in solution: