化学方程式的书写是中学化学的重难点之一,也是高考化学试题中的必考点,特别是对氧化还原反应方程式配平的考查更是近几年高考的热点。本文从氧化还原反应的配平原则和步骤、一般方法和特殊技巧的配平等方面突破氧化还原反应方程式的配平。一、配平原则和对象1.原则化学方程式配平的根本原则是质量守恒,同时在氧化还原反应中存在着电子转移引起的元素化合价的升降,因此还 Chemistry equation writing is one of the most difficult chemical high school chemistry, but also the college entrance examination chemistry test points must be, especially for the redox reaction equation test is even more in recent years college entrance examination hot spots. This article breaks through the redox reaction equation balances from the principles and steps of redox reactions, general methods and special techniques. First, the principle and object of grading 1. Principle The fundamental principle of chemical equation grading is the conservation of mass, while there is electron transfer in the redox reaction elemental valence rise, so also