有关离子共存问题在历年的高考试题中几乎成为必考题,纵观近几年的试题,不难发现这类试题的考查的方式在不断变换。笔者认为要圆满解答此类试题,关键是要认真领会有关离子共存的基本规律,本文现就这一专题内容进行分类探讨。题型一:题干无隐含条件的离子共存问题的直接考查 The problem of co-existence of ions has almost become a must-have item in the examination questions of the past years. Looking at the examination questions in recent years, it is not difficult to find that the examination methods of such questions are constantly changing. The author believes that the key to satisfactorily answering such questions is to conscientiously understand the basic laws governing the coexistence of ions. This article is now discussing the content of this topic. Question type one: direct examination of ion coexistence problems with no implicit conditions