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守恒存在于整个自然界的万千变化中。化学反应是原子之间的重新组合,反应前后组成物质的原子个数保持不变,即物质的质量始终不变,即质量守恒。运用守恒定律,不纠缠过程细节,不考虑途径变化,只考虑反应体系中某些组分相互作用前后某些物理量或化学量的始、终态,从而达到速解、巧解化学问题的目的。一切化学反应都遵循守恒定律,在化学变化中有各种各样的守恒,如质量守恒、元素守恒、原子守恒、电子守恒等等,如果能熟
Conservatism exists in thousands of changes throughout nature. Chemical reaction is the recombination between atoms, the number of atoms before and after the reaction remains unchanged, that is, the quality of the material is always the same, that is, the conservation of mass. Using the conservation law, without entangling process details, regardless of route changes, only the onset and the end of some physical or chemical quantities before and after the interaction of certain components in the reaction system are considered, so as to achieve the purpose of quick solution and clever solution to chemical problems. All chemical reactions follow the law of conservation, there are a variety of conservation in chemical changes, such as conservation of mass, conservation of elements, conservation of electrons, conservation of electrons, etc., if it can be cooked