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NaOH是初中化学学习中需要掌握的一种重要的碱。Na0H变质问题常出现在实验探究题、填空题或计算题中,是全国各省市的中考命题热点。笔者发现,几乎所有关于NaOH变质的问题都以人教版义务教育教科书《化学(九年级)下册》第十一单元课题1的课后习题2为蓝本。讲透关于NaOH变质的系列问题,不仅能培养学生综合运用化学知识的能力,还能培养学生的逻辑思维能力与思辨能力。结合一线教学经验,笔者设置
NaOH is an important base to be mastered in junior high school chemistry learning. Na0H metamorphic problems often appear in the experimental exploration questions, fill in the blank questions or calculation questions, the provinces and cities nationwide test hot topic. The author found that almost all the questions about NaOH metamorphosis are based on the after-school exercise 2 of the 11th unit of the textbook “Chemistry (Grade 9) Volume 1” of the compulsory education textbook of the People’s Education Press. Speaking through a series of questions on the deterioration of NaOH, not only can students develop the ability to use chemical knowledge, but also to develop students’ logical thinking ability and speculative ability. Combination of front-line teaching experience, I set