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细细研究近几年各地高考化学计算题,不难发现有些化学计算题涉及的反应较多,变化过程也十分复杂,解题时如果仅仅根据化学方程式逐一分析,按部就班地进行计算,往往会导致解题思路混乱,不但费时费力,而且极易出错,有时甚至无法解答.解题时如果能换个角度去思考,注重整体把握,不过多追究其反应过程,而是找出初始成分与最终成分之间的关系进行整体分析,可使解题思路清晰,计算简化,从而快速求解.下面通过四道典型例题的剖析来谈谈解答化学计算题的方法,供同
A careful study of chemical calculation questions in college entrance examinations in recent years shows that some chemical calculation questions involve more reactions and the process of change is also very complicated. If only the analysis of chemical equations is performed one by one, and the calculations are carried out step by step, they often lead to It is not only time-consuming and laborious, but it is also time-consuming and laborious, and it is even prone to errors. Sometimes it is even impossible to answer questions. If you can think differently when solving a problem and focus on the overall understanding, you can only find out the initial and final components. The overall analysis of the relationship between the two can make the problem-solving thinking clear, simplify the calculation, and thus solve the problem quickly. The following answers the question of solving the chemical calculation problem through the analysis of four typical examples.