Ion Reactions Based On The Cai Technology Instructional Design And Practice Of Research

21st century is the age of information .Too short knowledge renewing cycle and the ways of acquiring knowledge learned by people become diversified, with the purpose of fitting in with the needs of the development of era,CAI in modern teaching was born and it in the modern teaching has been paid to more and more great attention. In analytical chemistry of middle school,some knowledge is within the area of study of microcosmic chemistry,it is very difficult to show how does the internal reaction, the students are out of their depth in this part knowledge .This research will work to how to apply rational use of CAI in classroom, how to show dynamic simulation of its interl substance with computer ,and transform solidness into hollowness,tiansform vividness into dull,so as to study.In the course of research, we will choose one class for experiment and use CAI for this class and teach the student about electrolyte.At the same time,the compared class is used traditional teaching method.Through the questionnaire investigation,test and interview,we want to know that the change of the students'interests, motivation ,spirits,feeling and other non-intelligence about this part,and the state of achievement.At the last ,we want to provide scientific valuation for the knowledge of ion reaction which be used CAI through a statistical analysis .Through the practice of studying the concept translate,the following conclusion can be reached:Compared with traditional teaching method, CAI teaching method has the obvious superiority,it can help student learn abstract concept;it can promote creative spirit;it can increase the capacity of study.We hope that the results and conclusion have significance for the front line chemistry teacher.