Application Research On System Superposition In Ionic Equilibrium Of Aqueous Solution

"Ion balance in aqueous solution" is a key and difficult point in high school chemistry teaching as well as a hotspot for college entrance examination.However,regardless of the "teaching" and "learning" process for both teachers and students,there is a common problem that no unit analysis model is set up.Thereforeforthe complex aqueous solution analyzing,most students have problems in understanding the relationship of the related ion concentration and getting a clear distinction between primary and secondary of the balance system.According to the situation mentioned above,the aticle takes an example from the "the ion balance in aqueous solution" from the first three sections,chapter 3,Chemical Reaction Principle " Electives 4,People's Eduction Press,and carries on the practice study with system superposition method and from perspective of teachers,emphasizing on how to use the system superposition theory to teach and guide the students to use this method.Finally a specific teaching step and pattern in applying the system superposition to "ion balance" in aqueous solution were concluded,and a certain number of teaching case were presented,which provide the reference in teaching processfor front-line teachers.Based on the new teaching reform background of high school chemistry,standard,and current situation,the “ion balance in aqueous solution” was considered as the research topic.In this dissertationthe study theorywas discussed firstly,thena survy among the front-line teacher and students who are learning this moduleswas carried out.Through the relevant data analysis and constant revising and improving the knowledge system and related teaching case refering to application of system superposition method in teaching process,anexpectedbreakthrough about the learning of the aqueous solutionis made.