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Physical Chemistry

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 Joined: 26 Dec 2006 Post: 51
1 Feb 2007 00:24:08 IST
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Ammonia
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Ammoniumhydroxide (AH)  is aqueos solution  of amm. in water.
In a bottle of AH it is mentioned that it contains 25% ammonia
28% of ammonia is eqivalent to what % of AH.?.....
The ans is 56.6%
That means  56.6% of AH  contains 28%oof ammonia and rest is water

PRove this using valid statement and formula

Forum Expert
Joined: 29 Dec 2006
Posts: 5535
19 Feb 2007 02:28:11 IST
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You have used 25% and 28% ammonia in your problem. I an taking 28%

Consider 100 gram sample. It must be made by mixing 28 g of ammonia with 72 g of water.

17g of ammonia reacts with 18 grams of water to make 35 gram of ammonium hydroxide

So amount of ammonium hydroxide formed is (35/17)*28 = 56.6

So percentage of ammonium hydroxide is 56.6%

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