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Primary batteries and related carry important knowledge value

by:dcfpower     2021-03-21
u003cpu003e Concepts are very important in the subject curriculum. For chemistry subjects, concepts are also the basic and core knowledge in learning. The chemical concept is a summary of the essential attributes of chemical substances abstracted from a large number of facts. It plays an important role in the knowledge network of chemistry 'as a node'. Based on these basic chemical concepts, students can connect seemingly fragmented chemical knowledge to form a complete knowledge network in their minds. If the learner's cognitive structure does not form a clear chemical concept, he will not be able to truly grasp the internal connections and laws of chemical changes. u003c/pu003eu003cpu003eu003cpu003eu003c/pu003eu003cpu003e The concept of galvanic battery is a core concept that can integrate many basic knowledge and basic concepts. It can play a point-to-face role and has an important position in the chemistry curriculum system. , Is a focus of high school chemistry teaching. The high school chemistry curriculum standards put forward the following requirements in the compulsory and elective modules: In the compulsory, students are required to give examples of the conversion relationship between chemical energy and electrical energy and its application, and to recognize the importance of researching new batteries; in the optional modules Requires students to understand the causes of energy conversion in chemical reactions, understand the working principle of primary batteries, be able to write electrode reaction and battery reaction equations, understand the types of common chemical power sources and their working principles, and understand the practical significance of the mutual transformation of chemical energy and electrical energy And important applications, it can explain the causes of electrochemical corrosion of metals, understand the hazards of metal corrosion, and explore measures to prevent metal corrosion through experiments. For this reason, the general high school curriculum standard experimental textbook published by Shandong Science and Technology Press briefly introduces the principle of galvanic battery in Compulsory 2. After students have completed the compulsory courses, they have mastered certain basic chemistry knowledge. In elective 4 'Principles of Chemical Reactions\u003c/pu003eu003cpu003eu003cpu003e At the same time, the issue of primary battery is also required in the college entrance examination over the years. In the college entrance examination questions in recent years, the investigation of the concept of primary battery is more flexible. The judgment of poles, the writing of electrode equations, the movement of electrons, etc., are closely linked to production and life. In the process of solving practical problems, a comprehensive investigation of the principle and related content of the galvanic battery is completed. It can be said that the concept of the galvanic battery has become an effective investigation One of the important knowledge carriers for students' comprehensive application knowledge analysis and problem solving ability. u003c/pu003eu003cpu003eu003c/pu003eu003c/pu003eu003c/pu003eu003c/pu003e
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