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在数学上,我们算过求平均数的题目,可表达为:m=(a+b)/2,且a>b>0时,a>m>b.我们把它引入化学计算中,能使很多题目转繁为简,化难为易.例1计算下列不同质量的20%的硫酸和10%的硫酸相混合后,所得溶液的溶质质量分数,并填表1.思考:混合前后硫酸溶液中溶质、溶剂、溶液的量分别发生了什么变化?混合液的溶质质量分数与混合前两溶液的溶质质量分数大小有何关系?由此你可以得到哪些结论?
In mathematics, we have calculated the problem of averaging, which can be expressed as: m = (a + b) / 2 and a> b> 0, a> m> b. We introduce it into the stoichiometry So a lot of topics turn Fan Jane, the difficulty is easy.Example 1 Calculate the following different mass of 20% sulfuric acid and 10% sulfuric acid phase, the solute mass fraction of the resulting solution, and fill in Table 1. Reflections: before and after mixing the sulfuric acid solution What are the changes in the solute, solvent, solution volume? What is the relationship between the solute mass fraction of the mixture and the solute mass fraction of the two solutions before mixing? Which conclusions can you get?