Application On Chemical Experiments In Chemistry Teaching

Chemistry is an experiment-based subject,and experiments are essential for chemistry teaching.Chemistry experiments help students master experimental operating skills,exercise practical skills,feel the knowledge intuitively,stimulate students' interest in learning,and cultivate students' innovative thinking skills and scientific inquiry spirit.The thesis combines the experimental teaching model in chemistry experiment teaching with the theoretical research achievements of experimental teaching design.It lays a theoretical foundation for the study of teaching practice.The questionnaire is designed from four aspects: students' focus when they do the experiment,students' understanding of the links between chemistry and life,their ability to deal with the problems in the experiment,and their knowledge of experimental devices.What's more,through the method of interview,the problems students of grade two in the internship high school encounter during the chemical experiment are discovered.To deal with these problems,the thesis,based on the courses of Conditions of Affection on Chemical Equilibrium,Hydrolysis of Salt,Ionization of Weak Electrolyte and Galvanic Cells,in the Elective 4 in high school education,adopts the experimental teaching model in which students learn by themselves under the guidance of the teacher,designing the experiment-centered teaching case.A class with medium level of chemistry in grade two in the internship high school is selected as the experimental class.By analyzing the situations of students' hands-on ability before and after the implementation of the case,their answers to questions in class as well as the changes of students' chemistry scores,it is demonstrated that the implementation of the case has effective effects on students' chemistry learning.Practice has proved that for the student's chemistry experiment learning problems,the teaching design and implementation centered on experiments can help students solve the learning problems of chemical experiments and promote students' understanding of knowledge and ability development.