守恒关系在自然学科中有着多种形式,而在中学化学里,主要包括质量守恒、能量守恒和电荷守恒等三大守恒体系。搞清它们的守恒关系及应用范围和方法,对于系统地理解和掌握相关化学知识、解答化学习题都会有一定的辅助作用。本文将分别阐述各守恒关系及主要应用方面(按表末序号)。 Conservative relations have many forms in the natural sciences, and in the middle school chemistry, they mainly include the three conservation systems of mass conservation, energy conservation and charge conservation. Knowing their conservation relations and application scope and methods will have a certain role in assisting in the systematic understanding and mastering of relevant chemical knowledge and solutions. This article will elaborate on each conservation relationship and its main applications (by the end of the table).