“水溶液中的离子平衡”这一单元是高中化学中一项重要的组成内容,该方面知识包含内容较多,学生在理解和掌握方面难度较大,为了降低学生学习难度,使学生能够更好的掌握相关知识,教师除在讲课时需要采用适当的教学方法外,还要在开始讲课前做好这一单元整体的教学设计. “Ion balance in aqueous solution ” This unit is an important component of high school chemistry, this knowledge contains more content, students are more difficult to understand and master, in order to reduce the difficulty of students to enable students to Better grasp of relevant knowledge, teachers need to adopt appropriate teaching methods in addition to lectures, but also in the beginning of lectures before doing a good teaching of the unit’s overall design.