同学们在书写化学方程式时常出现以下几种错误：一是臆造化学方程式或化学式书写错误；二是未配平，违反质量守恒定律；三是错写或漏写反应条件；四是错标或漏标“↑”或“↓”．为了避免以上错误，书写化学方程式时应注意以下问题： 确认化学反应可以发生，正确书写化学式 化 Students write the chemical equations often appear the following errors: First, to make chemical equations or chemical formula writing errors; Second, not balanced, in violation of the law of conservation of mass; Third, wrong write or write reaction conditions; Fourth, wrong standard or missing target “↑” or “↓”. To avoid these errors, note the following when writing chemical equations: Confirm chemical reactions can occur and correct chemical formulating