在复习卤素一节时,同学们提出了这样的问题:“在AgF、AgCl、AgBr、AgI中,从左到右为什么键的极性是依次减弱?溶解度是依次减小?颜包是依次加深的呢?”。此类问题,在中学阶段不容易解决。若不用离子极化理论知识来解释,往往花费很大的气力还说不清楚,学生也常常感到很难理解。现就结合学生的实际情况,如何应用离子极化理论知识来解释上述问题,谈谈本人的一点粗浅体会。 During the review of the halogen section, the students asked the question: “In AgF, AgCl, AgBr, AgI, from left to right why the polarity of the bond is sequentially weakened? The solubility is reduced in turn? Yan Bao is in turn deepened What about it?” Such problems are not easily solved in the middle school. If you do not use ion polarization theory to explain, it is often unclear how much effort is spent and students often find it difficult to understand. Now, on the basis of the actual situation of the students, how to apply the knowledge of ion polarization theory to explain the above-mentioned problems, and to talk about one’s own superficial experience.