Chem acid

fish

原帖由 arararchchch 於 11/7/2008 23:03 發表

                               
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I think the question is "How to Distinguish two different acid chemically "

Add Cu to both the solutions

Ionic-half equation:

1M HCl : Cu(s) + 2H+(aq) -->  Cu2+(aq) + H2(g)

Colourless bub ...

Copper will not (or is expected not to) react with HCl.

[ 本帖最後由 fish 於 11/7/2008 11:08 PM 編輯 ]

Ivanhy92

原帖由 fish 於 11-7-2008 23:06 發表

                               
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Copper will not (or is expected not to) react with HCl.

Oh no! I forgot it. Thx for reminding me about this.

咁仲易,一個有reaction,一個no reaction.

Nidoq

最common的都寫了...

AgOH + HCl → H2O + AgCl

AgCl & AgOH are white jelly-like solid
so no observable change

AgOH + HNO3 → H2O + AgNO3

AgOH dissolves

只好亂寫答案OTL
這個有可能對嗎? (舉手~

fish

原帖由 Nidoq 於 12/7/2008 13:30 發表

                               
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最common的都寫了...

只好亂寫答案OTL
這個有可能對嗎? (舉手~

AgNO3, CH3COOAg等物更好

AgOH  is unstable at RT.
It exists as Ag2O at RT.

[ 本帖最後由 fish 於 12/7/2008 01:43 PM 編輯 ]