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离子共存是化学高考的一个重要考点,也是难点,题目中常出现一些隐含的条件,如不能挖掘出来,会给解题带来很大的困扰.本文详细阐述了与离子共存相关的隐含条件并举例说明,以期同学们能够顺利解决离子共存的题型.1常见隐含条件类型及解题策略1.1隐含强氧化性溶液的条件1)“NO_3~-+H~+”即稀硝酸型.溶液中有大量的NO_3~-和H+或者含NO_3~-的溶液与含H+的溶液混合,即相当于稀硝酸,溶液具有强氧化性.
Ion coexistence is an important test point for chemical college entrance examination. It is also a difficult point. Some implied conditions often appear in the subject. If it cannot be excavated, it will cause great problems for solving the problem. This paper elaborates the implied conditions related to ion coexistence. And to illustrate, in order to students successfully solve the problem of ion coexistence. 1 common types of hidden conditions and problem solving strategy 1.1 implicit strong oxidizing solution conditions 1) “NO_3~-+H~+” ie dilute Nitric acid type. A large amount of NO_3~- and H+ or solution containing NO_3~- in the solution is mixed with the solution containing H+, which is equivalent to dilute nitric acid, and the solution has strong oxidizing property.