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在进行苏教版化学1“硝酸的性质”实验时,笔者发现整个实验存在着比较多的难以克服的缺陷:试剂用量大;装置密封性差;NO和NO2用量无法控制而导致污染严重,侵害教师和学生的身体健康。因此,笔者就是否演示铜和硝酸反应实验进行了调查,教师对该实验都表示困惑:不演示不仅让学生失望,还违背了《课程标准》的基本理念:“通过以化学实验为主的多种探究活动,使学生经历科学研究的过程,激发学习化学的兴趣,强化科学探究的意识,促进学习方式的转变,培养学生的创新精神和实践能力。”若演示则过程复杂,产物污染严重,不符合绿色化学的理念,给学生带来化学是一门危险学科的负面影
In the Sujiao version of chemistry 1 “nitric acid ” experiment, the author found that the entire experiment there are more difficult to overcome the defect: a large amount of reagent; device sealing is poor; NO and NO2 dosage can not be controlled and lead to serious pollution, Infringe on the health of teachers and students. Therefore, the author conducted a survey on whether or not to demonstrate copper and nitric acid reaction experiments, and teachers were all puzzled by the experiment. Not only did the demonstration not only disappoint the students, but they also violated the basic idea of “curriculum standards”: “Through chemical experiments A variety of inquiry activities enable students to go through the process of scientific research, stimulate the interest of learning chemistry, strengthen the awareness of scientific inquiry, promote the transformation of learning styles, and cultivate the students’ innovative spirit and practical ability. ”If the demonstration is complex and the product is polluted Serious, not in line with the concept of green chemistry, to bring chemistry to students a negative shadow of a dangerous subject