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Physical Chemistry

Cool goIITian

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

Comments (1)

Krishna Gopal Singh

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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