化学方程式是重要的化学用语,是用化学式来表示化学反应的式子,化学方程式必须准确地反映出参加反应的各物质在反应前后的定性和定量的关系;因此书写化学方程式必须遵守质量守恒定律,即化学方程式等号两边各元素的原子总数必须相等,这就是配平化学方程式的依据. The chemical equation is an important chemical term. It is a formula that expresses the chemical reaction. The chemical equation must accurately reflect the qualitative and quantitative relationship between the substances that participate in the reaction before and after the reaction. Therefore, the chemical equation must be written in accordance with the law of conservation of mass. The total number of atoms of each element on both sides of the equal sign of the chemical equation must be equal, which is the basis of the equilibrium chemical equation.