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近年来,以生产生活及实验探究为题材的应用性问题成了化学计算的主流。这类试题重视考查学生分析问题、解决问题的能力,具有较高的区分度。阿基米德掌握了杠杆原理,所以他自信地讲“给我一个支点和一根足够长的杠杆,我就可以撬起地球”。学习中,若能掌握行之有效的方法,我们就会像阿基米德一样自信。现以2007年中考典型试题为例,介绍化学计算的解题策略,供参考。
In recent years, the application of the subject matter of production, life and experimental inquiry has become the mainstream of chemical calculations. This type of examination emphasizes the ability to examine students’ problems in analyzing and solving problems and has a high degree of differentiation. Archimedes has mastered the principle of leverage, so he confidently said, “Give me a fulcrum and a long enough lever so that I can pick up the earth.” In learning, if we can master effective methods, we will be as confident as Archimedes. Taking the typical test questions for the 2007 mid-term exam as an example, the problem-solving strategies for chemical calculations are presented for reference.