Study On The Teaching Design Of Chemical Acid Alkali And Salt In The Stage Of Junior Middle School Based On Particle View

The knowledge of chemical acid-base and salt in the junior high school is complicated,trivial,large in memory capacity and comprehensive in terms of topics.Therefore,the learning of acid-base and salt is the biggest differentiation point of junior high school chemistry,and it is also the difficulty of junior high school chemistry teaching.In the past two years,the requirement for core qualities of middle school students has required teachers to focus on cultivating students’ subject quality in teaching.In view of this,the author proposes a junior high school acid and alkali salt teaching design based on the microscopic view.This study is divided into five parts:The first part is the introduction of the relevant contents of the research of the project,the purpose of the research project and its practical value,the content and ideas of the research.The second part is the literature review,which mainly reads the relevant literature on the concept of microscopic particles and teaching design,and conducts analysis and research.Then the relevant concepts are defined in conjunction with the research content of this topic.The third part is the analysis of the knowledge of acid-alkali salt.It mainly studies and analyzes the curriculum standards,the status and role of acid-base salt knowledge,and the content and value of acid-base salt knowledge.The fourth part is the analysis of the situation,use the two-stage test questions to understand the students have the former scientific knowledge.The fifth part is the analysis and implementation of teaching design.Based on the analysis of teaching design strategy,teaching ideas,teaching objectives and teaching process,the teaching design based on particle concept is carried out and put into practice.The data obtained will be analyzed and studied.The sixth part is the conclusion and reflection,introducing the conclusions of this study and the deficiencies of the research.The conclusions of this study include:1.After a comprehensive analysis of the teaching of acid-base salt,this study proposed the teaching design of acid-base salts using the microscopic view as the main line.These include three teaching cases:the conductivity of the solution,the neutralization reaction of the acid and and the conditions for the occurrence of the metathesis reaction.These three teaching cases provide new ideas and new methods for the teaching of acid-base salts in junior middle schools,which are helpful for teachers to solve the confusion in the teaching of acid-base salts.2.The teaching of acid-alkali salt based on microscopic view is helpful for junior high school students to understand the nature and relationship of acid-base salt knowledge,especially for the development of microscopic effect view.3.The teaching of acid-alkali salt based on the microscopic view requires students to have a good level of microbiological construction.Otherwise,the teaching design has no effect on students’ learning effects of acid-base salt.