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一、物质与水反应型例 1 将 8克ＳＯ3 完全溶于 92ｇ水中 ,所得溶液中溶质的质量分数为 .解析 ＳＯ3 溶于水生成硫酸 ,所得溶液中的溶质是Ｈ2 ＳＯ4 而不是ＳＯ3.设 8ｇＳＯ3与水反应 ,生成Ｈ2 ＳＯ4 的质量为ｘ.ＳＯ3+Ｈ2 Ｏ =Ｈ2 ＳＯ480 988ｇｘｘ=98× 8ｇ80 =9 8ｇ所得
I. Substance and Water Reaction Example 1 Eight grams of SO3 was completely dissolved in 92 g of water. The mass fraction of the solute in the solution was analyzed. SO3 was dissolved in water to produce sulfuric acid. The solute in the solution was H2SO4 instead of SO3. Set 8g SO3. Reacts with water and produces H2SO4 with mass of x.SO3+H2O=H2 SO480 988gxx=98*8g80=9 8g