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在近年来的各地高考的理综化学试卷中,计算型选择题都占有比较大的比例。如果同学们仔细研究就会发现,虽然计算型选择题的题型有别,但很多是“形变神不变”。那么如何才能快速、准确地求解,自然成了同学们非常关心的问题,下面我们举例说明,希望同学们能够从中受到有益的启发。一、巧设数据,化繁为简例1将适量铁粉放入三氯化铁溶液中,完全反应后溶液中Fe~(3+)与Fe~(2+)浓度相等,则参加反应的
In recent years, college entrance examination of science and technology chemistry papers, computational choice questions occupy a relatively large proportion. If students study carefully, they will find that although there are different types of questions in computational choice, many are “immutable”. So how to quickly and accurately solve, naturally became a matter of great concern to students, let us illustrate the following, I hope the students can be useful inspiration. First, cleverly set the data, the complexity of a brief example 1 The amount of iron powder into the ferric chloride solution, the complete reaction of the solution Fe ~ (3 +) and Fe ~ (2+) concentration equal, then participate in the reaction