1. Teaching of the physical properties of hydrogen chloride
Display hydrogen chloride samples
Demonstration fountain experiment
2. Teaching of hydrogen chloride laboratory preparation method
1. Reaction principle
Limited by the knowledge level of students, I have adopted the method of narration in the teaching of reaction principle. On the basis of the students’ cognitive level, "precisely" the principle of reaction, break through the difficulties, guide the analysis of the role of concentrated sulfuric acid and NaHSO4 in the reaction, and let students realize the influence of different external conditions on the reaction itself, reflecting the dialectical relationship between internal and external factors .
2. Experimental device and experimental operation
According to the characteristics of this course, I use the method of "exploratory research" to teach this part of the content. "Exploratory research" is the core of "creative teaching". It focuses on highlighting the subjectivity of students, allowing students to comprehend the charm of scientific research, enjoy the fun of creative activities, and cultivate creative thinking and creative consciousness, create individuality, and create personality. The training of the people is carried out simultaneously.
The teacher first puts forward the purpose of the experiment, allowing students to independently and boldly propose ideas based on the knowledge they have learned, freely selecting the required instruments in the "computer laboratory", and assemble a set of feasible experimental devices. At the same time, in order to improve the students' hands-on operation ability, the students assemble the instrument by themselves and prepare and collect a bottle of HCl gas. Through mutual discussion and mutual evaluation, increase the assistance and communication between students, stimulate students' enthusiasm for learning, and give full play to the active role of the subject. Teachers make suggestions at the right time, ask questions about the specific operation of the experiment, stimulate thinking, cultivate the breadth and depth of students' thinking, and further improve students' experimental skills. Through the realistic demonstration of computer animation images, students can have a strong impression of the destructive effect of suction on the experimental device and realize the necessity of preventing suction.
Customer Service