“锁零法”配平氧化还原反应方程式陕西省略阳县一中杨建兵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。对于反应物中含有中学阶段不常见价态的氧化还原反应方程式的配平，学生往往无处下手。本人在教学中总结出用“锁零法”来解决这类问题... “Lock zero method” trims the redox reaction equation The equalization problem of the redox reaction equation in Yiyang Jianzhong, Yiyang County, Shaanxi Province is not only the focal point of middle school chemistry teaching, but also a difficult point. For the trim of the redox reaction equation that contains the unusual valences in middle school, students often have no place to start. In my teaching, I summed up the use of “zero lock method” to solve this type of problem...