有关氧化还原反应方程式的配平问题不仅是中学化学教学的重点,同时也是难点。还是历年高考的热点之一。其综合性强,方法多,如化合价升降法、待定系数法、观察法、零价法等,但只有根据反应式类型和特点选择最优的配平方法,才能达到快速、简便、准确的目的。对于反应物中含有中学阶段不常见价态的氧 The redistribution of redox equation is not only the focus of high school chemistry teaching, but also difficult. Or one of the hot spots in the calendar year. Its comprehensiveness, many methods, such as valence lift method, to be determined coefficient method, observation method, zero price method, but only according to the type and characteristics of the reaction to choose the best method of balance, in order to achieve fast, simple and accurate purpose. For reactants containing secondary valency oxygen is not common state