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需要用讨论的方法求解的化学计算题,一般都比较复杂,题目中包含着一些不确定因素,解题时必须认真剖析习题,挖掘题目中的不确定因素与哪些确定量有关(比如物质的组成、性质、反应规律、周期表中的位置等),然后围绕这些隐含的确定量,把不确定因素全部列举出来,将各种可能得到的条件分别加以讨论比较,方能化不确定因素为确定量,求得完整准确的答案。讨论型计算题解法较多、若仅就其在解题时出现的先后来划分,通常分为三类。笔者拟从教学实践出发,浅谈几种解法在化学习题中的应用。
The stochastic computational problems that need to be solved by the method of discussion are generally complicated, the subject contains some uncertainties, the problem must be carefully analyzed, and the uncertainties in the subject are related to the certain quantities (for example, the composition of matter , The nature, the law of the reaction, the position in the periodic table, etc.). Then, around these implicit determinations, all the uncertainties are enumerated. All the possible conditions are discussed and compared respectively, and the uncertainties are Determine the amount of, find the complete and accurate answer. There are many discussion-based calculation problems, and if they are divided only one by one in solving problems, they are usually divided into three categories. The author intends to start from the teaching practice, talking about the application of several solutions in chemical exercises.