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经常遇到的氧化还原反应大多是以离子的形式在水溶液中进行的。离子方程式的配平一般用氧化数变化法和离子电子法。实践证明,这两种配平方法各有其优缺点。下面介绍一种基于电荷平衡和部分原子平衡的配平方法,以作补充。这种方法无需考虑原子的氧化数及其变化,也不必考虑反应中电子得失的情况,它对许多离子方程式的配平有简单明了,容易掌握之特点。现以几种不同情况分别讨论如下:
Often encountered in the redox reaction in the form of ions in aqueous solution. Ion equation of the general use of oxidation number changes and ionic electron method. Practice has proved that these two trim methods have their own advantages and disadvantages. Here is a balanced method based on charge balance and partial atomic balance, to supplement. This method does not need to consider the atomic number of oxidation and its changes, do not have to consider the reaction of the electronic gain and loss of the situation, it has many simple ion equation equation, easy to grasp features. Here are a few different situations are discussed as follows: