| Chemical reaction rate, chemical equilibrium and chemical equilibrium mobile is form chemical equilibrium system,The system involved in the chemistry concept called chemical balance of the related concepts. Chemical concepts of balance is one of the core concept of high school chemistry, it is the foundation that the students grasp the chemical reaction essence and regularity, it can guide students to explore and inferring the important basis of material properties, it also the tools to solve the problem of production and living of the practice about the balance for students, it can promote students to understand element compound knowledge and cultivate students’logical thinking ability.Years of teaching practice and the author’s survey found that students feel difficult to learn when learning chemical balance related concepts, teachers also feel hard to teach. But the data shows, the research about the concept of high school chemistry balance studying or teaching are relatively few. Therefore, on the basis of analyzing the related theory of concept learning, combining the characteristics of chemistry discipline, the chemical equilibrium concept system and the characteristics are analyzed in this topic; Combining the Chemistry textbooks in Sue for high schools, the high school chemistry curriculum standard, college entrance examination paper investigation trend in recent years and so on, the content and requirements of the chemical equilibrium learning concept are summarized and analyzed, then on this basis, the author constructs the evaluation of high school chemistry balance related concept learning level evaluation index. Then using the means such as data analysis, interview, questionnaire survey, the author investigates the difficulties in learning chemical balance related concept, emotional experience, the study way and the knowledge construction and influencing factors of the probe. The results are as follows:(1)41.23%of the students are interested in chemical balance related concept’s study,89.48%of students have been fully aware of the importance of chemical balance related concept learning;(2) the students especially boys, are more inclined to autonomous learning way and inquiry learning with teachers inspiration.(3) the concepts of chemical equilibrium is still the difficulties in the students’learning, the difficulties in hydrolysis equilibrium of learning is the most; (4) the students’ understanding of the concepts of related chemical equilibrium exist lots of fuzzy concept, its representation is relatively single, also with language and chemical symbol is given priority to, and the level of students’knowledge construction is very low;(5) although the students think that the cause of the difficulties in learning chemistry balance related concept is the class knowledge abstraction, comprehensive, but also they fully realize the importance of emotional factors and the impact of learning evaluation of their psychological.(6) as the amount of information and information types on the rise, it will greatly influence the quality of the student solving the problem about chemical equilibrium related concept,especially the increasing of the chemical symbols and graphics information will easily lead to students’cognitive overload.(7) students is generally believed that the existing such as adding more background knowledge in the textbooks, sample analysis, can improve their learning efficiency. Now, many schools use the guided Learning case to make up the deficiency in above aspects.(8) targeted questions in the process of teaching and using examples of quantity and quality, is one of the most teaching factors that influence the students’learning.In view of the students’learning situation of chemical equilibrium related concept and existing problems, the author proposed the teaching suggestion as follows:(1) using a variety of sample teaching method to promote students to understand and use(2) optimizing the learning materials to provide more background materials and learning guidance(3) attaching great importance to the problem of design in particular to guide the student to take the initiative to explore... |
