The Exploration Of High School Chemistry "Ion Reaction" Teaching Guided By Subject Accomplishment

The knowledge related to ion reaction is not only the key content in the high school chemistry knowledge system,but also the important link and bridge from the macro perspective of junior high school to the micro perspective of senior high school,which plays an important role in effectively improving the students' core accomplishment of chemistry.The concepts of electrolyte,non-electrolyte,ionization and ion reaction can expand and deepen students' understanding of substances and their changes,establish their awareness of learning chemical knowledge from the micro perspective,and improve their ability of macro identification and micro analysis.Based on experimental inquiry,problem-driven discovery learning can help students construct a clear model of aqueous solution cognition and scientific inquiry thinking,and effectively improve students' evidence reasoning and model cognition accomplishment.At the same time,the study of the content of ion reaction plays a good role in the subsequent study of salt hydrolysis and electrochemical knowledge.Under the conditions of multi-media assisted teaching,teachers can more aptly and vividly present the behavior changes of microscopic ions,and students can express their understanding and analysis of ion reactions in solution more accurately and clearly.This paper is divided into six parts to discuss the teaching design and implementation of "ion reaction",a required course in high school chemistry:The first part is the research background and significance of this paper.The author analyzed the research background of ion reaction and determined the research direction and significance of this paper.In the second part,the author found the theoretical basis,analyzed the research status of the content of ion reaction,collected a large number of cases to improve the students' chemical core accomplishment,and determined the foothold of the core accomplishment in the teaching of ion reaction.The third part defines the research objectives,contents,methods and ideas of this paper.The research content includes curriculum standard requirement,chemical core accomplishment requirement and concept definition.Finally,the research ideas of this paper are presented in the research block diagram to provide clear steps and ideas for the research of this paper.The fourth part is the teaching case of ion reaction designed by the author based on the theoretical guidance,combined with the curriculum standards and literacy requirements,and with the help of information teaching means.The fifth part is the teaching case of the implementation of ion reaction and the data analysis after the implementation.The sixth part puts forward the conclusion of this paper and points out the shortcomings in the process of this paper.