Improvement Of High School Chemistry Experiment Based On The Concept Of Green Chemistry

Chemistry experiment is an important part of chemistry teaching.Green experiment has gradually become a hotspot in current chemistry experimented teaching,which has a unique effect on improving the quality of chemistry teaching and students' awareness of environmental protection.In accordance with the necessity of permeating the concept of green chemistry between experimental teaching in middle schools and the improvement in experimental teaching and the requirements of the new curriculum standard for experimental teaching.The improvement in high school chemistry experiments based on the concept of green chemistry can reduce the threat to the health of teachers and students from polluting gas experiments.Environmental pollution reflects the concepts of saving drugs,reducing costs and environmental protection,improving students' experimental ability,promoting students' overall development,and providing a certain reference to the experimental teaching of middle school chemistry teachers.This research mainly includes the following parts:The first part is a review of the relevant literature on the improvement in high school chemistry experiments,and it is found that the current improvement of the experiment need to be strengthened in terms of green chemisrty;The second part are to use questionnaire survey methods to investigate the experimental level of high school students.It is found that students have a relatively shallow understanding of green chemistry experiments,and their thinking ability,design ability,practical ability,problem-solving ability and experimental inquiry ability are generally low.According to the survey results,it is necessary to conduct green experiment exploration in high school chemistry teaching;The third part,on the basis of following the principles of scientificity,greenness,safety,observation,operability and innovation of chemical experiments,from the miniaturization of instruments,the miniaturization of medicines,the integration of devices and the greenness of the experimental process from the chemical point of view,the preparation and property experiment of Cl2,the preparation and property experiment of SO2,and the preparation and property experiment of NH3 have been improved;In the fourth part after the pre-experiments were successful,designed a corresponding teaching case for practice in a middle school in Ningxia.After the practice,the effect of the improvement of the experiment were tested by means of evaluation scales and questionnaires.The research results showed that the improved experimental device had good airtightness,effectively avoiding the risk of gas leakage,saving a large amount of experimental drugs,reducing environmental pollution,and improving the experimental teaching effect without affecting the experimental teaching effect.Safety and environmental protection reflect the concept of green chemistry,enhance students'awareness of green environmental protection,and provide a reference for the experimental teaching of middle school chemistry teachers,indicating that the improvement of high school chemistry experiments based on the concept of green chemistry has practical value.