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化学方程式的配平是化学学习的难点。这是因为配平“有法而无定法”。特别是初学者配平时多依赖于观察和不断的数字试验,“顾此失彼”是学生配平时出现的常见问题。分数系数法引入数学意义的平衡思想用于有单质的化学反应配平。通过先非单质元素后单质元素的固定配平步骤和“一配一毕,互不干扰”的配平特点有效地克服了“顾此失彼”和配平“摇晃”现象的出现。运用于教学中效果良好,学生乐于接受。
Chemical formula balance is the difficulty of chemical learning. This is because the trim “law and no law ”. In particular, beginners often rely on observation and continuous digital test grading, “” is a common problem that occurs when the student is grading. The fractional coefficient method introduces a mathematical balance of ideas for the chemical reaction of simple elements. Through the first non-elemental elements after the elemental element of the fixed grading steps and “one with one complete, non-interference ” trim effectively overcome the “carelessness” and trim “shake ” phenomenon. Used in teaching effect is good, students are willing to accept.