High school chemical sulfur dioxide courseware

The courseware of sulfur dioxide in senior one chemistry

Teaching objectives:

1. Knowledge and skill objectives:

1. Make students understand the physical properties and uses of sulfur dioxide. ⑵ Make students master the chemical properties of sulfur dioxide.

2. Process and Methods Objective:

Through two students' experiments, students' inquiry ability and methods of learning chemistry are cultivated.

3. Emotional attitude goal

(1) Make students understand the air pollution caused by sulfur dioxide and guide students to pay attention to environmental problems.

(2) Strengthen the awareness of environmental protection and be the master of cherishing home-the earth.

Teaching emphasis:

Difficulties in teaching the chemical properties of sulfur dioxide: the bleaching effect of sulfur dioxide.

Teaching supplies:

1. Students' supplies:

(in pairs) test tubes containing SO2 (two of them are plugged with rubber stoppers), test tubes, matches, sinks, alcohol lamps, litmus test solution (including droppers), magenta test solution (including droppers) and test tube clips.

2. Teachers' supplies: besides students' supplies, catheters, projectors, SO2 generators and colored flowers are needed.

teaching methods: heuristic teaching method, discussion method and experiment method.

Guidance of learning methods: 1. Do two experiments well and guide students to analyze and summarize.

2. The redox property of SO2 can be understood by analyzing the valence of sulfur.

3. The key to the bleachability of SO2 is to do a good job in experiments and compare it with chlorine water and sodium peroxide.

4. Guide students to evaluate the pros and cons of SO2 and find ways to turn harm into benefit.

Homework

1. Complete a small family experiment

Measure the pH value of rainwater

Section II Sulfur dioxide

1. Physical properties: colorless, pungent and toxic gas, easily soluble in water.

2. Chemical properties

1. Acidic oxide: SO2+H2O = = H2SO4 3

2. It is both oxidizing and reducing: 2SO2+O23 3. Bleachability: it is unstable when combined with organic matter.

third, the use of SO2

fourth, the pollution of SO2 to the environment

fifth, the prevention and control of SO2

Homework: P133: Exercise 1, Exercise 5: 1, 2.

Instruction design:

Based on the new curriculum concept, this class aims at improving students' scientific quality, and strives to construct curriculum objectives in three dimensions. In the instruction design, we adhere to the teaching principle of taking students as the main body, and carry out instruction design around students' learning and "autonomy, cooperation and inquiry". In this section, the nature of sulfur dioxide is studied as a carrier, and the experimental method is used to cultivate students' inquiry ability. Combined with the content of sulfur dioxide pollution to the environment in the teaching materials, students are trained to pay attention to environmental pollution, cultivate their sense of social responsibility and establish their sense of scientific development.

(1) Teaching material handling

The new curriculum emphasizes "using teaching materials" rather than "teaching teaching materials". Teachers are courses, and courses include teaching materials, teachers, reference materials, networks and other resources. Teachers can make adjustments as long as they complete the curriculum standards. Therefore, the following adjustments are made in this section:

1. Increase the experimental projection of sulfur burning in oxygen, and introduce a new lesson from the air quality daily.

2. Change the two demonstration experiments into groups of students. In order to ensure that students of sulfur dioxide toxic gas can do group experiments, this experiment has been improved.

3. Three pictures of sulfur dioxide pollution and pictures of the source of sulfur dioxide were added.

4, combined with the previous knowledge, increase the discussion of sulfur dioxide prevention and control methods.

5. Added pictures of flowers bleached with sulfur dioxide.

(2) Creating learning chemistry scenarios

In order to give full play to the role of emotional chemistry teaching, guide students to enter the state of learning and inquiry, stimulate students' interest in learning, and make learning more effective and targeted, the scenario creation in this section is designed as follows:

1. Guide students to learn sulfur dioxide from air quality daily. 2. Increase pollution and source pictures.

(3) In dealing with the relationship between teachers and students

Teaching can't be knowledge-based, knowledge is only the carrier, and the consciousness of "student-oriented" should be established. The new curriculum emphasizes that teachers are guides, promoters and collaborators. Therefore, in teaching design, we strive to design teaching from the perspective of students' learning activities, not from the perspective of knowledge structure. The specific treatment is as follows

1. Try to understand the nature of SO2 from students' experiments;

2. Design multiple learning and questioning, formative exercises and diagnostic exercises in the whole process, and strive for dialogue and interaction between teachers and students; 3. The focus of teaching is "accumulating grain widely" rather than "digging holes deeply". This section does not supplement the reaction of sulfur dioxide with chlorine, hydrogen sulfide and potassium permanganate, and this aspect will be further studied in the elective course of senior three.

(4) In terms of emotion, attitude and values

In order to make subject education reflect STS education, cultivate students' awareness of participation and interest in learning chemistry, cultivate students' understanding of life, society and nature from a chemical perspective, improve their ability to solve problems and develop the habit of lifelong learning chemistry, and at the same time, in order to dialectically treat sulfur dioxide, this section not only focuses on the pollution of sulfur dioxide, but also supplements the application of chemical methods to make it harmful. The specific treatment is as follows:

1. Downloaded the daily air quality report and other contents from the Internet.

2, combined with the previous knowledge, increase the discussion of sulfur dioxide prevention and control methods.