200克某硫*恰好與26克鋅完全反應,試計算: (1)生成*氣的質量; (2)硫*溶液中溶質的質量分數; (3...
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問題詳情:
200克某硫*恰好與26克鋅完全反應,試計算:
(1)生成*氣的質量;
(2)硫*溶液中溶質的質量分數;
(3)充分反應後所得溶液的質量。
【回答】
設生成H2質量為x,硫*溶液中溶質質量為y
↑ ·····························(1分)
65 98 2
26g y x ·····························(1分)
·····································(1分)
x=0.8g y=39.2g ····································(1分)
w(H2SO4) ························(1分)
反應後所得溶液的質量為:200+26-0.8=225.2g ············(1分)
答:(1)生成H2 0.8克;
(2)硫*溶液中溶質質量分數為19.6%;
(3)反應後溶液質量為225.2克。
知識點:未分類
題型:未分類