离子共存题是近年来会考、高考化学中的一种常见题型,它具有题型简单,知识面广,综合性强等优点,是用来考查学生元素及其化合物知识和综合应用能力的一种较好题型。判断各种离子在溶液中是否能大量共存,首先是要能迅速判断出哪些离子在溶液中不能共存,判断的方法分类如下。 The ion coexistence question is a common question in the college entrance examination and college entrance examination chemistry in recent years. It has the advantages of simple question type, wide knowledge, and strong comprehensiveness. It is used to examine student elements and their compound knowledge and comprehensive application ability. A better type of question. To judge whether various ions can coexist in large amounts in the solution, the first thing is to be able to quickly determine which ions cannot coexist in the solution. The method of classification is as follows.