Which of the following ions when treated with excess aqueous ammonia, gives a clear solution without any precipitates?
A. Fe2+ (aq)
B. Al 3+(aq)
C. Cu 2+(aq)
D. Pb 2+ (aq)
四個既hydroxides 都insoluble wor...
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關於chem 問題(ce chem)
2007-05-27 11:18 pm
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2007-05-27 11:21 pm
✔ 最佳答案
C. Cu 2+(aq)
2007-05-27 11:50 pm
The correct answer should be D.
The solution of Pb 2+ (aq) will dissolve in excess ammonia to give out a colourless solution. This is due to the formation of soluble colourless complex ions.
As something for extra, solution of Al 3+ (aq) and Zn 2+ (aq) will also dissolve in excess ammonia to give out colourless solutions.
Hope this helps.
The solution of Pb 2+ (aq) will dissolve in excess ammonia to give out a colourless solution. This is due to the formation of soluble colourless complex ions.
As something for extra, solution of Al 3+ (aq) and Zn 2+ (aq) will also dissolve in excess ammonia to give out colourless solutions.
Hope this helps.
參考: My Chemistry textbook and my Chemistry knowledge
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