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通过分析近两年各地中考题不难发现,中考化学中的计算题进一步降低了试题难度,但更加综合,大部分省市的考题通过创设一个具有实际背景、综合性和开放性的问题情境,留给学生更多的思考和发挥余地,使不同层次的学生得以表现自己的能力.绝大部分省市的计算题考察都是通过分析图表、分析标签、实验探究等形式,最后落脚到以化学方程式计算为基础,结合相对分子质量,混合物中某成分以及有关溶液的综合性计算题.下面对中考热点化学计算题进行归类总结.
Through analyzing the middle school entrance examination questions in the past two years, it is not difficult to find out that the calculation questions in the senior high school entrance examination chemistry further reduce the difficulty of the test questions. However, more comprehensive examination questions in most provinces and cities create a problem context with practical background, comprehensiveness and openness. Leaving students more thinking and exertion, so that students at different levels to demonstrate their ability to calculate the majority of provinces and cities are calculated by examining charts, analysis of labels, experimental research and other forms, and finally settled down to chemistry Equation calculation based on the combination of relative molecular mass, a mixture of components and the comprehensive calculation of the solution of the problem.