天平平衡问题是初中化学中考常考题型,这类问题由于前提条件不同,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.天平平衡问题的计算一般是在平衡的天平两边的反应容器内加入不同的反应物,通过计算,根据左盘净增加物质质量和右盘净增加物质的质量是否相等,来判断天平是否平衡.解题步骤如下: The question of the balance of the balance is often used in junior high school chemistry. This kind of question has different conclusions because of different prerequisites. Students often find it difficult to solve such problems. The calculation of the balance of the balance is generally on the balance. The reactants on both sides are added with different reactants. Through the calculation, whether the balance is based on whether the net mass of the net increase in the left disc and the mass of the net increase in the right disc are equal, the balance is determined. The solution steps are as follows: