化学方程式是化学知识的脊，也是学习化学的重要“工具”。正确、规范地书写化学方程式，对于整个化学学习具有十分重要的意义。然而，不少同学在书写化学方程式时，常因考虑不周到、理解不全面而出错。一、随意臆造事实上不存在的物质或化学反应这是犯了由而机械类推、臆造出 Chemical equations are the ridges of chemical knowledge and they are also important “tools” for learning chemistry. Correct and standardized writing of chemical equations is of great significance for the entire chemistry study. However, many students often make mistakes when they are writing chemical equations due to poor consideration and incomplete understanding. First, random fabrication of substances or chemical reactions that do not exist in reality