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对于某一道习题来说,由于思考问题的角度不同、思路不同,可能有几种或多种解法。教师可以引导学生从不同角度去分析解答,使学生对这种类型的题加深理解,不仅巩固了基础知识,也开发了学生的智力。下面举一例来说明其方法: 例题:在10℃时硝酸钾的饱和溶液100克,若温度升高到60℃时,还需要加入多少克硝酸钾才能达到饱和?(已知硝酸钾的溶解度,10℃,20.9克;60℃,110克)
For a certain exercise, because of the different perspectives and different thinking of the problem, there may be several or more solutions. Teachers can guide students to analyze solutions from different angles, so that students can deepen their understanding of this type of questions, not only consolidating the basic knowledge, but also developing the students’ intelligence. Here is an example to illustrate the method: Example: 100 grams of a saturated solution of potassium nitrate at 10°C. If the temperature rises to 60°C, how many grams of potassium nitrate will be added to achieve saturation? (The known solubility of potassium nitrate, 10 °C, 20.9 g; 60 °C, 110 g)