点击中考化学图表型计算题

• 作 者: 何如涛
• 出 处: 中学生数理化(初中版)
• 发表日期: 2003年Z1期
• 关键词: 计算题 盐酸反应 兴趣小组 江苏盐城 综合实践活动 实验数据 反应时 盐酸用量 成比例 分解反应

回眸２００２年中考化学计算题，不难发现，试题更加注重图表中相关数据的应用，此类题能较好地考查同学们接受信息、处理信息的能力．现举例分析如下．例１（江苏盐城）向一定量含有NaCl和CaCl２的混合溶液中逐滴加入溶质质量分数为２１．２％的Na２CO３溶液，所加入Na２CO３

Looking back on the chemistry calculation questions in the 2002 Entrance Examination, it is not difficult to find that the examination questions pay more attention to the application of relevant data in the charts. Such questions can better examine the ability of students to accept information and process information. An example analysis is as follows. Example 1 (Yancheng, Jiangsu Province) The Na2CO3 solution with a solute mass fraction of 21.2% was added dropwise to a certain amount of mixed solution containing NaCl and CaCl2, and Na2CO3 was added thereto.