化学习题是化学课程的有机组成部分,是化学教学过程中组织学生学习、实践活动的一种重要形式。《普通高中化学课程标准(实验)》指出:“不同类型的习题对巩固知识、发展学生的创造力有不同的作用。教科书编写时要注意开发新的题型,增加思考题、讨论题、实践题和开放题的比例;编制的习题应有助于学生发现问题和提出问题;要鼓励学 Chemistry Exercises are an integral part of chemistry courses and are an important form of organizing student learning and practice activities in chemistry teaching. ”Ordinary high school chemistry curriculum standards (experiment)“ pointed out: ”Different types of exercises to consolidate knowledge, the development of students’ creativity has a different role.When textbooks are written should pay attention to the development of new types of questions, increase the question of thinking, discussion questions, Proportion of practice and open questions; compilation of exercises should help students to identify problems and raise questions; to encourage learning