论文部分内容阅读
在化学计算题中数字千变万化,但解题思路和基本方法是不变的,可以根据物质的质量进行计算,或者根据物质的量计算.它们是化学计算中应掌握的基本知识,但由此衍变出的各种解题的技巧、方法,使得化学计算更加简单化,如守恒法是计算题中常用的一种解题方法.所谓“守恒法”解题就是利用一个体系变化前后的某些量之间的等价关系,以此作为解题依据,推理得到正确答案的方法.其特点是可以避开某些繁琐的中间过程,避免书写复杂的化学反应方程式,提高解题速度和准确度.常用的守恒法有质量守恒、元素(原子)守恒、电荷守恒、得失电子守恒等,下面就
In the chemical calculation of the ever-changing number, but the problem-solving ideas and basic methods are the same, can be calculated according to the quality of the material, or calculated according to the amount of material. They are the basic knowledge of chemical calculation, but the evolution A variety of problem-solving skills, methods, making the chemical calculations more simplistic, such as conservation is a commonly used method of solving problems. The so-called “conservation law” problem-solving is the use of a system before and after the change As the basis for solving problems and reasoning to get the correct answer.The method is characterized by avoiding some cumbersome intermediate processes and avoiding writing complicated chemical reaction equations to improve the speed and accuracy of solving problems Degree of conservation methods commonly used conservation of mass, conservation of elements (atoms), conservation of charges, gains and losses of electronic conservation, the following