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化学计算是中考化学考题中的必考题目,主要考查学生的综合分析能力、综合计算能力和化学知识的综合应用能力。因此解决好化学计算问题,对于全面提升学生的化学素养和化学能力至关重要。而化学反应中有关溶质质量分数的计算是初三化学计算的重点内容,也是化学计算教学中的重点、难点。
Chemical calculation is the subject of examination questions in the senior high school entrance examination, the main test students comprehensive analysis ability, comprehensive calculation ability and comprehensive application of chemical knowledge ability. Therefore, to solve the problem of stoichiometry, to improve the overall chemical education and chemical ability of students is essential. The calculation of solute mass fraction in chemical reaction is the key content of the first three chemical calculations, which is also the key and difficult point in the teaching of chemical calculation.