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一、复分解反应方程式的“离子价数交叉配平法”复分解反应是离子互换反应。离子互换时,遵循“等价交换”的原则──两种化合物相互交换的阳离子的总价数相等;相互交换的阴离子的总价数也相等。“等价交换”这一等量关系就是快速配平复分解反应方程式方法的依据。如果两种化合物每一分子内发生交换的阳(阴)离子的价数相等,则两物质分子式的系数相同;如果两种物质每一分子内发生交换的阳(阴)离子的价数不等,则可将各自的价数“交叉”作为
First, the metathesis reaction equation “ion valence cross-matching method” Metathesis reaction ion exchange reaction. Ion exchange, follow the principle of “equivalent exchange” - the two compounds are exchanged for the same price of the total number of cations; exchange of the total price of the anion is also equal. The equivalence relation of “equivalent exchange” is the basis of the method of rapidly leveling the complex decomposition reaction equation. If the valences of the positive and negative ions exchanged for each of the two compounds are the same, the coefficients of the two substance formulas are the same. If the valences of the positive and negative ions exchanged for each of the two compounds are not the same , Then the price of each can be “crossed” as