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随着高考的临近,全国各地的学校都在积极收集编制一些质量较高的高考模拟试题,进行考前的适应性训练。在每次模拟考试之后,针对考试题目进行学习、分析、研究和讨论,既可以提高对2014年高考考试大纲的理解把握,也有利于提高教师编选、使用习题的水平,保证试题的质量。笔者对所在学校2013年5月的一次适应性考试理综化学部分实验探究题28题第(3)小题第②小点的答案提出质疑,并设计实验探究,获得了意外的收获。一、问题的提出试题:某实验小组把CO2通入饱和Na2CO3溶液
With the entrance approaching, schools across the country are actively collecting prepared some high quality college entrance examination simulation questions, pre-test adaptive training. After each simulated exam, studying, analyzing, researching and discussing the exam questions can not only improve the comprehension and understanding of the 2014 college entrance examination exam outline, but also help to improve teachers’ compilation and use of exercises to ensure the quality of test questions. The author questioned the answer to the question (2), (2) and (2) of the experimental part of the adaptive fitness test in his school in May 2013 and designed the experiment to explore and obtained the unexpected result. First, the question raised Question: An experimental group of CO2 into saturated Na2CO3 solution