科目:高中化學 來源: 題型:閱讀理解
實驗編號 | 實驗操作 | 實驗現(xiàn)象 |
① | 加入適量稀鹽酸 | 有微量氣泡,固體全部溶解,得到澄清溶液 |
② | 加入適量蒸餾水 | 固體部分溶解 |
③ | 加入適量無水乙醇 | 固體部分溶解 |
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科目:高中化學 來源: 題型:閱讀理解
一定條件 |
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Ni,△ |
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△ |
催化劑 |
催化劑 |
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科目:高中化學 來源:物理教研室 題型:022
(1)濃硫酸可作氣體干燥劑
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(2)CuSO4×5H2OCuSO4+5H2O
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(3)2NaCl+H2SO4(濃)Na2SO4+2HCl↑
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(4)FeS+H2SO4(。┄T═FeSO4+H2S↑
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(5)Zn+H2SO4(稀)══ZnSO4+H2↑
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(6)Na2SO3+H2SO4══NaSO4+SO2↑+H2O
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(7)Cu+2H2SO4(濃)CuSO4+SO2↑+H2O
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(8)S+2H2SO4(濃)3SO2↑+2H2O
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科目:高中化學 來源: 題型:022
下列化學反應和事實,說明利用了硫酸的什么性質(zhì)?填在各小題的橫線上
(1)濃硫酸可作氣體干燥劑
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(2)CuSO4×5H2OCuSO4+5H2O
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(3)2NaCl+H2SO4(濃)Na2SO4+2HCl↑
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(4)FeS+H2SO4(稀)══FeSO4+H2S↑
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(5)Zn+H2SO4(。┄T═ZnSO4+H2↑
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(6)Na2SO3+H2SO4══NaSO4+SO2↑+H2O
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(7)Cu+2H2SO4(濃)CuSO4+SO2↑+H2O
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(8)S+2H2SO4(濃)3SO2↑+2H2O
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