所谓“守恒法”就是以化学反应过程中存在的某些守恒关系如质量守恒、元素守恒、得失电子守恒等作为依据来解题.运用守恒法解题既能提高解题的速度,又能提高解题的准确性,甚至还可以解决其他方法无法解决的问题.现将中学化学计算中常见守恒问题归纳如下. The so-called “conservation law ” is based on chemical reactions in the process of certain conservation relations such as conservation of mass, conservation of elements, conservation of gains and losses as the basis for solving the problem.Using the conservation law to solve problems not only improve the speed of problem-solving, and Can improve the accuracy of problem-solving, and even solve other problems that can not be solved.Currently the common conservation of chemistry in high school are summarized as follows.