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“守恒”思想不仅是化学之实质,而且也是在高中化学教学中十分常用的一种解决问题的方法。教师应当教会学生运用“守恒”的方法来解决学习中遇到的实际问题,这样就能让原本复杂的问题变得简单化。所谓守恒,就是指化学反应的过程中,存在某些守恒关系:如质量守恒(原子或原子团守恒)、电荷守恒、得失电子守恒以及一些化学变化前后恒定不变的量。应用守恒关系进行化学解题的方法叫作守恒法。本文从近几年高考题中选择有关化学计算中运用守恒法的解题方法,以实例分析。
“Conservative ” thought is not only the essence of chemistry, but also a very common method of solving problems in chemistry teaching in high school. Teachers should teach students to use the “conservative” method to solve the practical problems encountered in learning so that the original complex problems can be simplified. The so-called conservation, refers to the chemical reaction process, there are some conservation relationship: such as the conservation of mass (atomic or atomic group conservation), conservation of charge and loss of electronic conservation and some chemical changes before and after the constant volume. The method of solving chemical problems using conservation is called conservatism. This article from the college entrance examination in recent years the choice of chemical calculation of the conservation method of solving problems, with examples.