初中化学计算题的构造与命制类型

• 作 者: 孙成余
• 机 构: 宿迁市宿豫区教育局教研室,
• 出 处: 中学化学教学参考
• 发表日期: 2008年06期
• 关键词: 化学计算 解决过程 初中化学 解题能力 数学函数 畏惧感 解题思路 小思 反应方程式 语言表达能力

全国各地的中考化学题,在计算方面着实下了一番功夫,一些富有新意的考题在令人称赞的同时更使人赏心悦目,使学生走出了乏味、枯燥的计算误区,从而对化学计算产生了好感和兴趣。但就其解决过程而言,许多学生仍然存在两种困惑:一是感觉计算好做但不易得分;二是解答思路模糊,感觉雾里看花,产

The chemistry questions in the national examinations all over the country have made a lot of efforts in calculations. Some exciting new exam questions are pleasing to the eye and make people feel pleasing to the eye. This has led students to get rid of tedious and boring calculation errors, which have resulted in chemical calculations. Goodwill and interest. However, in terms of its solution process, many students still have two kinds of puzzles: First, they feel that the calculation is good but they are not easy to score;