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溶液计算是继化学用语之后,又一个使学生学习成绩易于发生分化的部分。其原因是:一、有关溶解度的计算类型较多,易混淆,二、课本例题少,习题难;三、学生对概念的理解比较模糊、基本计算题掌握得不牢固。我们要避免分化现象,就必须针对产生分化的原因,采取措施。一、把概念与计算紧密结合起来,循序渐进地完成概念与计算的迁移与拓宽加深。溶解度是溶液计算中的一个重要概念,我们要紧扣“在一定温度下”、“100克溶剂”、“达到平衡时”、“克数”等四个关键词语去分析,为了帮助学生理解溶解度概念,让学生进行简单的填表计
Solution calculation is the second part that makes students' grades easy to differentiate after chemistry terminology. The reason is: First, the calculation of the type of solubility are more confusing, Second, the textbook example less difficult exercises; Third, the students understand the concept of more vague, the basic calculation problem is not firmly grasp. To avoid the phenomenon of differentiation, we must take measures to address the causes of differentiation. First, the concepts and calculations are closely integrated, step by step to complete the concept and calculation of migration and broaden and deepen. Solubility is an important concept in solution calculation. We need to analyze the four key terms “at a certain temperature”, “100g solvent”, “at equilibrium” and “gram number”. In order to help students to understand the solubility Concept, let students fill in a simple meter