结合科研实际辩析化学教学中的两例错误

Discrimination of Two Mistakes in Chemistry Teaching Combined with Practical Scientific Research

2011国际化学年的口号是,"化学:我们的生活,我们的未来",重视化学的未来及其对未来生活的影响必须高度关注从青少年开始的化学入门教育。近年化学教学注重引入生活中实例进行解析,如在讲解溶解度曲线变化的应用时,引入"青海湖地区有一种说法:冬天捞碱,夏天晒盐"进行解析;也注重化学基本规律的推演与运用,如讲解"水的电离与溶液的pH"时,引入碳酸钠溶液随着温度升高时pH变化判断的问题。但是引用例不符合实际,整个青海省也无一个可冬天捞碱的盐湖;涉及"水的电离与溶液的pH"的一道高考题的正确答案违背实验事实。

The slogan of the international year for chemistry is ＂chemistry,our life,our future＂.Focusing on the future of chemistry and the related influence on the future life,high attention must be paid to the ushered-in education of chemistry beginning from the teenagers.Recent years,great attention has been paid in chemistry teaching to quoting of practical cases from the daily live.For example,the statement ＂a parlance in Qinghai Lake area said that soda extracted in winter and salt manufactured in summer＂ was quoted when explaining the application of solubility curves.Also,the deduction and application of chemistry basic rules is emphasized.One example is the introduction of pH change judgment for sodium carbonate solution during temperature rising procedure while explaining ＂ionization of water and pH value of aqueous solution＂.However,these two cases are not accord with the reality.That is not even a salt lake in Qinghai province could extract soda in winter,and a college entrance examination question concerned with ＂ionization of water and pH value of aqueous solution＂ violated with the experimental facts.