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离子共存题是高考化学中的一种常见题型。这类试题把元素化合物知识和基本理论进行串联。涉及的知识面广,灵活多变。综合性强。要想快捷地解答这类试题,应从以下几方面着手。 一、弄清离子不能大量共存原因 其原因可能是离子间发生: 1.复分解反应:常见的可分为下列几种情况。
The ion coexistence question is a common question in college entrance examination chemistry. Such questions connect the knowledge of elemental compounds with the basic theory. The knowledge involved is wide and flexible. Comprehensive strength. To quickly answer such questions, you should start with the following aspects. First, find out why the ions can not coexist in large quantities The reason may be due to the occurrence of ions: 1. Metathesis reaction: Commonly can be divided into the following situations.