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一我们抽查了今年全国高等学校招生的我省七个考区共290份化学试卷。经过分析和研究,我们认为:一年来我省中学化学教学,在加强基础知识教学和基本技能训练方面,已取得了一定的成绩;但问题仍然不少。为说明的方便,现逐题分析如下:第一题(试题略,下同):得分率为65%(就抽查部分而言,下同)。1.对氯气与铁、氢气、氢氧化钠溶液和硫化氢溶液等反应,能写出化学方程式的,占75%。对上述反应的条件与现象混淆不清、胡乱猜测的,占55%以上。此外,将生成物 Fecl_3写成 Fecl_2及将氢氧化钠溶液与氯反应写作2NaOH+Cl_2=NaCl+NaClO+H_2O 的,占25%以上。
First, we sampled a total of 290 chemical papers in the seven examination areas in our province for the enrollment of colleges and universities across the country this year. After analysis and research, we believe that: In the past year, chemistry teaching in middle schools in our province has achieved certain results in strengthening basic knowledge teaching and basic skills training; however, there are still many problems. For the convenience of explanation, the following questions are analyzed as follows: The first question (slightly for the test questions, the same below): The score rate is 65% (for the sampling part, the same below). 1. It is possible to write a chemical equation that accounts for 75% of chlorine, iron, hydrogen, sodium hydroxide solution and hydrogen sulfide solution. For the above-mentioned reaction conditions and phenomena confused, random guesses, accounting for more than 55%. In addition, the product Fecl_3 was written as Fecl_2 and the sodium hydroxide solution was reacted with chlorine as 2NaOH+Cl_2=NaCl+NaClO+H_2O, accounting for more than 25%.