氧化还原反应的配平（Trimming of redox reactions）.docVIP

氧化还原反应的配平（Trimming of redox reactions） Balancing reaction equations for redox reactions (first class) [teaching objectives] 1. knowledge objectives (1) the balancing principle of oxidation-reduction equation. (2) general steps to master the equation of equilibrium redox reaction. 2. ability and method goals Learning by balancing the redox equation improves the overall ability to move knowledge; 3. emotional and value goals (1) through the general oxidation-reduction reaction equation and the balance of the special oxidation-reduction reaction equation, we can understand the generality and particularity of things, and deepen the specific analysis of specific concepts. (2) through the study of some trimming techniques and the rules of balance, we should train students to create and discover the scientific beauty and regular beauty of the subject of chemistry, so as to improve their interest in learning chemistry. [key points and difficulties] Key: to enable students to master the principles and steps of reactions with new method of balancing oxidation. Difficulty: oxidation reduction equation equation trimming skills, master oxidation reduction reaction equation trim. In the course of teaching, students can find problems through exercises, and let students sum up the rules of balancing themselves to improve the ability of balancing the oxidation-reduction reaction equations. [teaching process] [review the basic concepts of oxidation reduction and introduce new courses] Question 1. projection of the following table, teacher guidance, teachers and students to discuss: The reactants and reaction products have changed properties of valence electron gain and loss situation The reducing agent increases with the reduction, the electron is oxidized, the oxidation reaction occurs, and the oxidation product The oxidant is reduced in oxidation, the electrons are reduced, and the reduction products are reduced 2.. For the following redox reactions, the direction and number of ele