化学计算是初中化学教学中的一个重要内容,也是一般测试、中考的必考内容,虽然分值比例不太大,但涉及的内容多、范围广。有些计算题,颇有一定的难度和深度,必须具备过硬的计算能力方可得以解决;有些问题难度不大但较为繁锁,学生在遇到这类问题 Chemistry calculation is an important part of junior high school chemistry teaching. It is also the necessary test content of general test and senior high school entrance examination. Although the score is not too large, it involves a lot of contents and a wide range. Some computational questions, quite a degree of difficulty and depth, must have excellent computing power can be resolved; some problems are not difficult but more complicated, students encounter such problems