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化学计算是从定量的角度研究化学基本概念和原理,是初中化学基础知识和基本技能的重要组成部分。笔者对近几年中考化学试卷上出现的化学计算进行了初步研究,发现不同类型计算题的解题过程是相似的,一般依据下面两个流程即可准确而快速的解出计算题。一、确定题型初中化学计算包括化学式计算、化学方程式计算、溶液计算、守恒计算、综合计算等。不同类型的计算有其独有的计算方法和技巧,因此认真读题,读出题目中出现的物质及其变
Chemical calculation is a quantitative study of the basic concepts and principles of chemistry, junior high school chemistry is the basic knowledge and basic skills an important part. The author conducted a preliminary study on the chemical calculation that appeared in the middle school entrance exam papers in recent years and found that the solving problems of different types of calculation questions are similar, and the calculation problems can be accurately and quickly solved according to the following two processes. First, determine the type of junior high school chemistry calculations include chemical formula, chemical formula calculation, solution calculation, conservation calculation, comprehensive calculation. Different types of calculation have their own unique calculation methods and techniques, so serious reading questions, reading out the subject matter and its changes