中学化学教学大纲指出:“化学计算能使学生从量的方面来理解物质及其变化的规律,并获得化学计算的基本技能。在教学中教师要加强解题指导,严格要求学生独立完成,要使学生在理解化学原理和化学知识的基础上进行计算,要注意计算的准确性”。这说明化学计算在化学教学中是相当重要的,特别是有关结合生产实际的计算,更须 The middle school chemistry syllabus pointed out: "Chemistry can enable students to understand the laws of matter and its changes from the aspect of quantity, and obtain the basic skills of chemical calculation. In teaching, teachers should strengthen the problem-solving guidance and strictly require students to complete independently, To enable students to calculate on the basis of understanding the principles of chemistry and chemistry, pay attention to the accuracy of calculations. This shows that chemical calculations are very important in chemistry teaching, especially when it comes to the calculation of actual production.