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Topic: chemical formula  (Read 4838 times)

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Offline cells

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chemical formula
« on: April 07, 2009, 11:10:15 AM »
Hi,
can anyone help me with determining the result of this chemical formula?  ???
(NH4)2SO4 + H3PO4 + KCl  = .+H2O.
or
(NH4)2SO4 + H3PO4 + KOH  = .+H2O.
the reaction is exothermic and results in a slurry-mud like substance which turned into solid after sometimes.

thanks.

Offline Borek

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Re: chemical formula
« Reply #1 on: April 07, 2009, 11:29:29 AM »
Chemical formula describes composition of a compound.

(NH4)2SO4 + H3PO4 + KCl  = .+H2O.

This is unfinished (and unbalanced) chemical reaction equation.
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Offline Arkcon

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Re: chemical formula
« Reply #2 on: April 07, 2009, 12:13:06 PM »
Determining a reaction can be a little difficult sometimes, especially in a case like youres, with more than one or two reactants.  It's also hard to use you observations to predict anything:

Quote
the reaction is exothermic

In the second case, acid plus KOH is itself exothermic.  So we can't be sure your observation describes the other reaction you're looking for.

Quote
and results in a slurry-mud like substance which turned into solid after sometimes.

This also, will depend more on how you mix things, than the real reaction.  For example, a 100 ml of a 0.1 M concentration of each reactant, that forms a solid?  It might, I don't know.  Or are you mixing these reactants essentially pure, in just a bit of water to make a paste?  Is that why you get a slurry?  I assumed these were each in aqueous solution, or are you mixing them dry in a furnace of some sort?
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Offline lancenti

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Re: chemical formula
« Reply #3 on: April 07, 2009, 12:57:39 PM »
Also worth considering is whether you're trying to make a reactant in situ, or 'on the spot'. Phosphoric (V) Acid with KCl will give HCl (g). So are you actually trying to use the HCl (g) or is it just a byproduct while you use the KH2PO4 instead?

http://en.wikipedia.org/wiki/Ammonium_phosphate

That link might be useful in deciding which one you're making.

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