點樣制取藍色ge氫氣化銅沉澱啊???
但係唔好變成黑色啊...
有次整左之後, 一陣間由藍色變成黑色.....
我想知道點樣可以整到唔會變色啊~~??
如何制取藍色的氫氣化銅沉澱啊~~??
2007-02-28 9:23 pm
回答 (2)
2007-03-01 3:35 am
✔ 最佳答案
用硫酸銅(II)加入氫氧化鈉，記住，氫氧化鈉屬於強鹼，只要加少量就可以。添加時滴一滴，攪一攪，滴一滴，攪一攪~~~~~或者把氫氧化鈉換成氨水。
至於變黑色，你加了什麽呢？如果按上面的程序應該不會。我就試過制取硫酸銅(II)時，把硫酸加到氧化銅裏，變黑了，驚訝！！
之後把試管加熱，一段時間后，變藍色啦~~原來反應慢。
2007-03-02 3:00 am
氫氣化銅沉澱= Cu(OH)2, copper (II) hydroxide
Just add some sodium hydroxide (NaOH) into copper (II) sulphate solution (CuSO4), but not adding NH3 ( ammonia), or else the compound produced will not be 氫氣化銅沉澱.
氫氣化銅沉澱 will not turn black when it's left.
Just add some sodium hydroxide (NaOH) into copper (II) sulphate solution (CuSO4), but not adding NH3 ( ammonia), or else the compound produced will not be 氫氣化銅沉澱.
氫氣化銅沉澱 will not turn black when it's left.
參考: chem knowledge
收錄日期: 2021-04-13 14:17:36
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https://hk.answers.yahoo.com/question/index?qid=20070228000051KK01297