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question on ammonia
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Topic: question on ammonia (Read 2989 times)
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junbumkim
Regular Member
Posts: 10
Mole Snacks: +0/-0
question on ammonia
«
on:
May 27, 2007, 07:32:44 PM »
so ammonia (NH3) in solution forms NH
4
OH,
so in a reaction such as NH
3
+ ZnI
2
,
the products or Zn(OH)
2
+ NH4
+
right?
does that mean, even before NH3 is added to ZnI
2
, ammonia solution is in the form of NH
4
OH ?
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Yggdrasil
Retired Staff
Sr. Member
Posts: 3215
Mole Snacks: +485/-21
Gender:
Physical Biochemist
Re: question on ammonia
«
Reply #1 on:
May 27, 2007, 08:15:12 PM »
Here's how I would write the equations for the reaction:
NH
3 (l)
+ H
2
O
(l)
--> NH
4
OH
(aq)
2NH
4
OH
(aq)
+ ZnI
2 (aq)
--> Zn(OH)
2 (s)
+ 2NH
4
I
(aq)
with the net ionic equation for the second reaction being:
2OH
-
(aq)
+ Zn
2+
(aq)
--> Zn(OH)
2 (s)
You could combine the first two reactions to write:
2NH
3 (l)
+ 2H
2
O
(l)
+ ZnI
2 (aq)
--> Zn(OH)
2 (s)
+ 2NH
4
I
(aq)
but separating them into two equations makes it more clear what is happening.
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question on ammonia