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在初中化学教学中,化学方程式是化学学科记录、交流的基本语言,因此准确地书写、配平化学方程式就显得十分重要,它也是一切依据化学方程式计算的基础。配平化学方程式,就是依据以客观事实为基础,物质间能发生化学反应,然后再依据质量守恒定律,调整化学式前边的化学计量数,使得式子左右两边达到原子的种类相同,数目相等。现行教材中介绍的化学方程式的配平方法是——最小公倍数法,但笔者经过多年的教学实践发现这种方法操作起来并不
In junior high school chemistry teaching, the chemical equation is the basic language of chemistry records and communication. Therefore, it is very important to write and calibrate the chemical equation accurately. It is also the basis of all calculation based on the chemical equation. Balancing chemical equations is based on objective facts, chemical reactions can occur between substances, and then based on the law of conservation of mass, the chemical equation to adjust the front of the stoichiometry, so that the type of atomic atoms on both sides of the same type, the same number. The current teaching methods described in the chemical equation trim method is the least common multiple method, but the author after many years of teaching practice found that this method does not operate