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Topic: 2 reactions  (Read 3435 times)

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Offline Rutherford

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2 reactions
« on: May 16, 2012, 12:34:33 PM »
1.In the reaction:
Mg(OH)2+2NH4++HPO42- :rarrow: MgNH4PO4+NH4OH+H2O what should I write in the index after H2O and NH4OH (l) or (aq)?
2.http://en.wikipedia.org/wiki/Nitrate_test the brown ring test, should I write (g) after NO?
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Offline Rutherford

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Re: 2 reactions
« Reply #1 on: May 17, 2012, 07:56:24 AM »
My guess for the first is (aq) because it is an aqua solution.
For the second one (g)?
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Offline AWK

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Re: 2 reactions
« Reply #2 on: May 17, 2012, 08:18:13 AM »
NH3(aq) instead of NH4OH

NO concentration is so small that it is soluble in solution - then very fast bounded by Fe2+ - (aq) or nothing.
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Offline Rutherford

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Re: 2 reactions
« Reply #3 on: May 17, 2012, 08:40:09 AM »
So, instead NH4OH I write NH3+H2O?
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Offline AWK

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Re: 2 reactions
« Reply #4 on: May 17, 2012, 09:02:38 AM »
It is better. In the Arhenius theory NH3.H2O was used instead.
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Offline Rutherford

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Re: 2 reactions
« Reply #5 on: May 17, 2012, 11:47:22 AM »
Ok, thank you.
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