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近几年各地中考出现了许多图象题,一些考生囿于思维定势,不注意坐标意义的变化,对形似而实不同的图象不能准确判断.本文就金属与酸反应的图象进行比较分析,以帮助同学们提高对图象题的解题能力.一、横坐标意义不同,比较两种金属与酸反应的图象1.等质量的 Zn、Fe 与足量的等质量分数的稀硫
In recent years, there have been many image questions in the local examinations. Some candidates are in a paradoxical position and do not pay attention to the changes in the meaning of coordinates. It is impossible to accurately judge images that are similar in form but different in reality. This article compares the images of metal and acid reactions. Analysis to help students improve their ability to solve problems. First, the abscissa is different in meaning, compare the two metals and the reaction of the acid image 1. Equal quality of Zn, Fe and a sufficient amount of lean sulfur