The Research And Practice Of Middle School Chemical Experiment Teaching Based On Green Chemistry Theory

The development of human society cannot do without chemical progress.The chemistry is a subject closely related to life.C urrently,the global environment is increasingly deteriorative and the green chemistry has become an important direction of chemical scientific research.In middle school chemistry teaching,the pollutant types of chemical experiment is diverse and the resource consumption is high,which not only harms the environment but also affects the health of teachers and students.The greening impro vement of senior high school chemistry experiment can not only ensure the health of teachers and students,but also have a profound significance in improving the overall quality of students,forming chemical scientific literacy and developing the new teaching model of new curriculum standard.On the basis of the summary of "green chemistry" concept and principles,this paper carries on the statistics of eight texts of PEP edition high school chemistry,analyzes the pollution problems through the questionna ire survey,statistics and analysis of teachers and students in high schools in Ruijin C ity,finds that students and teachers don't pay attention to green chemistry knowledge and green experiment,and thus puts forward the significance and practical signif icance of the research.On the basis of the connotation and principle of green chemistry experiment,this paper conducts experiment device greening improvement of the reaction experiment of ammonium chloride crystals and barium hydroxide crystals and the reaction experiment of copper and concentrated sulfuric acid,conducts experimental supply microscale improvement of the bromoethane elimination reaction and its product test experiment,the sulfur dioxide acidity and bleachability test and conducts the experimental supply microscale improvement of the "double-cell" primary cell experiments and electrolytic copper chloride solution experiment.In addition,it conducts specific case teaching practice for the relevant chapters and courses of the reaction experiment of ammonium chloride crystals and barium hydroxide crystals and "double-cell" primary cell experiments.The improved experiments better meet the teaching practice of high school chemistry experiment and reflect the green chemistry concept.