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化学平衡是化学教学的重点,也是各类考试的热点,更是教学活动中让教师和学生颇感头痛的难点,在化学平衡习题教学中,有时如果顺着题意思考,不仅解题烦琐,思路混乱,甚至还可能导出错误结论,但如果能根据化学平衡的特点,挖掘化学平衡的等效性,巧妙地应用等效思维进行思维转换,往往能达到柳暗花明忽然开朗的效果。一、应用等效思维判断平衡移动的方向判断浓度、压强、温度等因素对平衡移动的影响,同学们最熟悉的便是勒夏特列原理,但部分同学在解题中
Chemical balance is the focus of chemistry teaching, and it is also a hot spot for all kinds of examinations. It is also a difficult point for teachers and students to feel headaches in teaching activities. In chemical equilibrium exercises, sometimes it is not only troublesome to solve questions if they follow the question. The ideas are confusing, and even wrong conclusions may be derived. However, if we can excavate the equivalence of chemical equilibrium according to the characteristics of chemical equilibrium and skillfully apply the equivalent thinking to change the mind, we can often achieve the effect of sudden and cheerful. First, the application of equivalent thinking to determine the direction of balance movement Judgment of the impact of concentration, pressure, temperature and other factors on the balance of movement, the students are most familiar with Le Chatelier principle, but some students in the problem