根据化学方程式的计算是初中学生必须掌握的重要技能,因此成为中考考查的重点和难点。随着新课程改革全面实施,近年来根据化学方程式的计算删除了多步反应、过量计算等过繁过难的内容,设题形式多种多样,如:表格型、图像型、信息型等,命题注重从知识立意转向能力立意,使设题既有知识面的宽度,又有思维的深度。 Calculations based on chemical equations are important skills that junior high school students must master and therefore become the key and difficult point in the exams. With the full implementation of the new curriculum reform, in recent years, according to the calculation of chemical equations, multi-step reactions and excessive calculation have been deleted. There are various forms of design questions such as form, image and information, Proposition focus on the conception of ability from the conception of knowledge to conception, so that the question has both the breadth of knowledge, but also the depth of thinking.