分辨 氯化鋇 碳酸鉀 濃硫酸 硝酸鋅
即 BaCl2 (aq) K2CO3 (aq) H2SO4 (aq) Zn(NO3)2 (aq)
只可以互相混合作分辦
如何分辨以下數種化學品?
2014-05-15 5:16 am
回答 (2)
2014-05-15 7:08 am
✔ 最佳答案
答案如下：圖片參考：https://s.yimg.com/lo/api/res/1.2/Kn3C0ze92EN1oV63Zbf8.A--/YXBwaWQ9dHdhbnN3ZXJzO3E9ODU-/http://dc733.4shared.com/img/3j-P7dm3ce/s7/145fb44b438/2014-05-14B.png?async&rand=0.5437102323924293
http://dc733.4shared.com/img/3j-P7dm3ce/s7/145fb44b438/2014-05-14B.png?async&rand=0.5437102323924293
參考: pingshek
2014-05-15 6:55 am
Ba2+ + SO42- ----------->BaSO4(s)
Precipiate is formed
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K2CO3+H2SO4-------------->K2SO4+ C02 + H2O
colorless gas bubble evolves
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Zn2+ + SO42- ------------>ZnSO4 ,no observable change
Precipiate is formed
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K2CO3+H2SO4-------------->K2SO4+ C02 + H2O
colorless gas bubble evolves
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Zn2+ + SO42- ------------>ZnSO4 ,no observable change
收錄日期: 2021-04-30 17:14:51
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20140514000051KK00139