离子反应方程式是重要的化学术语,判断和书写时,要熟悉书写规则,更要具备对物质的组成、性质和数量关系的认识和分析能力。在教学中怎样突破这个难点,关键有三点:一、明了一个“态”字反应物和生成物中,唯有易溶强电解质如强酸、强碱、可溶性盐等在溶液中全部以自由离子状态存在时,用离子符号表示。其他如难溶、难电离、气体、单质及氧化物等均以化学式表示。即使是易溶强电解质,若特定反应条件下不全部以 The ion reaction equation is an important chemical term. When you are judging and writing, you must be familiar with the rules of writing, and you must have the ability to understand and analyze the composition, nature, and quantity of matter. There are three key points in how to overcome this difficulty in teaching: First, to understand a “state” word reactant and product, only the easily soluble strong electrolyte such as strong acid, strong alkali, soluble salt, etc. in the solution are all free In the presence of an ionic state, it is represented by an ion symbol. Others such as insoluble, difficult to ionize, gas, simple substance and oxides are expressed by chemical formulas. Even if the electrolyte is easily soluble, not all of the