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[Chem] neutralization of ammonia 果陣...

neutralization of ammonia 果陣...

當 neutralization between ammonia and nitric acid
咁佢ge balanced equation 應該係....
a) NH4OH- (aq) + HNO3(aq) --> NH4NO3(aq) + H20(l)

or

b) NH3 (aq) + HNO3---> NH4NO3(aq) +H20
   

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引用:
原帖由 fishbiscuit123 於 2012-2-18 12:33 AM 發表
i didn't see any source that provide that NH3 is Arrhenius base
When i search NH3 with keyword "arrhenius base"
what i found are all negative results like "Why is NH3 not a arrhenius base"
And my t ...
I don't know which search engine you use.
However, I can see arguments on both sides in Google search.

On the +ve side:
http://www.chemicalforums.com/index.php?topic=392.0
http://preparatorychemistry.com/Bishop_Book_atoms_8.pdf

http://www.chemguide.co.uk/physical/acidbaseeqia/theories.html

Arrhenius theory has deficiency but it still explains the basic nature of NH3 in aqueous solution.

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回覆 31# 桃子 的帖子

All of the three sites do not focus on "dissociation", but just producing hydroxide ion is okay
According to them, even bicarbonate is arrhenius base because of the following reaction
CO32- + H2O <> HCO3- + OH-
which produces OH-
However, bicarbonate is definitely not an arrhenius base
since its reaction with Arrhenius acid will produce additional product, CO2
which violate the definition of Arrhenius acid-base theory, water and salt are the only products of reaction between Arrhenius base and acid

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引用:
原帖由 fishbiscuit123 於 2012-2-19 03:10 PM 發表
All of the three sites do not focus on "dissociation", but just producing hydroxide ion is okay
According to them, even bicarbonate is arrhenius base because of the following reaction
CO32- + H2O   ...
Arrhenius acid-base theory does NOT state that water and salt are the only products.

Also, a soluble carbonate (eg. Na2CO3) is indeed an Arrhenius base.
http://preparatorychemistry.com/Bishop_Base_Identification.htm
There are plenty of examples of weak Arrhenius bases in this web page.

As a note, some ionic compounds with anions other than hydroxide are indeed strong Arrhenius bases.

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回覆 33# 桃子 的帖子

Arrhenius acid-base theory DO states that only water and salt are formed from Arrhenius acid-base reaction.
http://en.wikipedia.org/wiki/Acid-base_theory
As defined by Arrhenius, acid–base reactions are characterized by Arrhenius acids, which dissociate in aqueous solution to form hydrogen ions (H+),[6] and Arrhenius bases, which form hydroxide (OH−) ions. More recent IUPAC recommendations now suggest the newer term "hydronium.
If you keep avoiding the word "dissociate", i think it is worthless to discuss anymore
http://www.google.com.hk/search? ... iw=1440&bih=775/[/url]
Of course, NaH is not Arrhenius base

[ 本帖最後由 fishbiscuit123 於 2012-2-19 09:11 PM 編輯 ]

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引用:
原帖由 fishbiscuit123 於 2012-2-19 09:08 PM 發表
Arrhenius acid-base theory DO states that only water and salt are formed from Arrhenius acid-base reaction.
http://en.wikipedia.org/wiki/Acid-base_theory
As defined by Arrhenius, acid–base reaction ...
Wikipedia is NOT an academic source!

The chapter written by Mark Bishop is extracted from a textbook, which is a much more acceptable academic source.

From what I've read so far, Arrhenius theory never states that salt and water are the only product.

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