An iron rail is heted with concentrated sulphuric acid . Which of the following combination is correct?
A.hydrogen given off;pale green soluion formed
B.hydrogen given off;yellow soluion formed
C.sulphur dioxide given off;pale green soluion formed
D.sulphur dioxide given off;yellow soluion formed
Please answer with a Chemical equation as an explanation.
A ce Chemistry mc q
2006-10-23 5:26 am
回答 (2)
2006-10-23 6:48 am
✔ 最佳答案
Answer should be D Reaction between conc. sulphuric acid and iron metal will release sulphur dioxide gas and iron(III) sulphate.
2Fe(s) + 6H2SO4(l) ------〉Fe2(SO4)3(aq) + 3SO2(g) + 2H2O(l)
Iron(III) ion is yellow so the ans is D
參考: Notes
2006-10-23 6:23 am
應該係c
因為conc. h2so4 同Fe 會行 redox reaction
sulphate ions will be reduced to sulphur dioxide and Fe will be oxidized to Fe2+ ions (green colour).
至於點解唔係oxidized to Fe3+ 就要 你上a level 先會解到la.
個人意見only!~thx
因為conc. h2so4 同Fe 會行 redox reaction
sulphate ions will be reduced to sulphur dioxide and Fe will be oxidized to Fe2+ ions (green colour).
至於點解唔係oxidized to Fe3+ 就要 你上a level 先會解到la.
個人意見only!~thx
參考: 自己學過
收錄日期: 2021-04-13 00:22:51
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