天平平衡问题是初中化学试卷中常出现的问题,也是总复习中的一个难点,这类问题南于前提条件不同,最后得出的结论也不同,学生往往对这类问题的解决感到比较困难。解这类题的关键是抓住天平平衡的条件——左盘和右盘物质的质量相等。仞中化学阶段常接触的天平平衡问题多是把活泼金属(或碳酸盐)和盐酸或稀硫酸反应与天平平衡问题联系在一 The problem of balance balance is a common problem in junior high school chemistry papers and also a difficult point in the general review. Different types of questions are different from those in the south, and the conclusions are different at the end. Students often find it difficult to solve such problems. The key to solving such problems is to balance the balance of conditions - the quality of the right disc and right disc material equal.仞 in the chemical stage often contact with the balance of balance are mostly the lively metal (or carbonate) and hydrochloric acid or sulfuric acid reaction balance balance problem in a