无数据计算题在中学化学中经常碰到,学生往往无从下手。解题时应全面把握题目所给信息,挖掘整体结构中的关键条件,进行分析,抓住问题的本质。对已知条件从整体结构进行解剖、变形,替代、转化等灵活处理,真正理解化学概念,挖潜和发现关键,化难为易、化繁为简,从而迅速、简捷解决 No data calculation problems often encountered in secondary chemistry, students often have no way to start. When solving problems, we should fully grasp the information given by the subject, excavate the key conditions in the overall structure, analyze and grasp the essence of the problem. Known conditions from the overall structure of anatomical, deformation, substitution, transformation and other flexible treatment, the true understanding of chemical concepts, potential and find the key to the difficult as easy, simplification, so as to quickly and easily solve