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A correct chemical equation


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#1 Primarygun

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Posted 2 March 2005 - 08:50 AM

Ammonia dissolves in water and react with water to form ammonium ions and hydroxide ions.
NH3(aq)+ H2O(l)+ HCl(aq)----> H2O(l)+ NH4Cl(aq)
Or NH4OH(aq)+HCl(aq)---->NH4Cl(aq)+H2O(l)

Moreover, can anyone write down the ionic equation of hydrogen chloride gas dissolve in sodium hydroxide?
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#2 BenSon

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Posted 2 March 2005 - 09:08 AM

I think this is what you are looking for...
The net ionic equation is
NH4+ + OH- + H+ + Cl- = NH4Cl + H2O

The half equations are
NH4OH = NH4+ + OH-
HCl = H+ + Cl-

~Scott
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#3 Primarygun

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Posted 2 March 2005 - 09:28 AM

NoNo. I know of the concept.
I want to check how do we present it.
hydrogen chloride gas is one of the reactants. However, before the chemical equation, itself ionizes first. In this equation, it is (g) not named (aq).
Therefore, I think the correct equation may differ from that one.
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#4 BenSon

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Posted 2 March 2005 - 09:35 AM

Sorry i didn't read your post closely enough. I'm not quite sure... but if it ionizes before the equation it shouldm't make a difference if the ions are in solution or not. I think the end products will be the same.

~Scott
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#5 Primarygun

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Posted 2 March 2005 - 09:39 AM

I wonder whether the ionic equation is different.
Such as now, chlorine atom is now considered taking part in the reaction as it finally becomes ions.
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#6 BenSon

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Posted 2 March 2005 - 09:52 AM

I was just thinking that if the HCL is gas, and the NH4OH is aqueous, then wouldn't the HCL have to become aqueous in order to react with the NH4OH? I think the ionic equation would be the same either way unless theres some rule im not remembering.

~Scott
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#7 Primarygun

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Posted 2 March 2005 - 10:06 AM

How about the ionic equation between solid sodium carbonate and hydrochloric acid?
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#8 BenSon

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Posted 2 March 2005 - 10:37 AM

Ah now that one is easy...
HCl(aq) + NaCO3(s) = HCO3(aq) + NaCl(aq)
HCl = H+ + Cl-
NaCO3= Na+ + CO3-

2HCO3(aq) quickly decomposes into H2O(l) and CO2(g)

So it is more like HCl + NaCO3 = H2O + CO2 + NaCl (<= I know its not balanced)

~Scott
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#9 budullewraagh

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Posted 2 March 2005 - 10:15 PM

"Ammonia dissolves in water and react with water to form ammonium ions and hydroxide ions.
NH3(aq)+ H2O(l)+ HCl(aq)----> H2O(l)+ NH4Cl(aq)
Or NH4OH(aq)+HCl(aq)---->NH4Cl(aq)+H2O(l)

Moreover, can anyone write down the ionic equation of hydrogen chloride gas dissolve in sodium hydroxide?"

ammonia in water is NH3(aq) not NH4OH. hydrogen chloride gas doesn't really dissolve in sodium hydroxide. it just reacts with the sodium hydroxide, forming a soluble salt.
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#10 BenSon

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Posted 3 March 2005 - 03:14 AM

NH3(aq) is a weak base in equilibrium.
NH3(aq) + H2O(l) <=> NH4+ + OH-
So wouldnt it be fair to say that the reactants are still NH4+ and OH-, even if its not in the form of NH4OH? just curious.
NH3(aq) +HCL(g) + H2O = NH4CL + H2O

Primarygun- The ionic equation for the reaction between NaOH and HCL is
Na+ + OH- + H+ + Cl- = H2O + NaCl
Half equations
NaOH = Na+ + OH-
HCl = H+ + Cl-

~Scott
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#11 budullewraagh

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Posted 3 March 2005 - 03:42 AM

"NH3(aq) is a weak base in equilibrium.
NH3(aq) + H2O(l) <=> NH4+ + OH-"
to the former, yes. to the latter, no, not really. it's been recently found that ammonia in solution is NH3(aq), not NH4OH(aq)
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#12 BenSon

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Posted 3 March 2005 - 03:59 AM

Fair enough...
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#13 Primarygun

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Posted 3 March 2005 - 12:48 PM

Na+ + OH- + H+ + Cl- = H2O + NaCl
Half equations
NaOH = Na+ + OH-
HCl = H+ + Cl-


Are you sure? The original reactant is a gas.

NH3(aq)+ H2O(l)+ HCl(aq)----> H2O(l)+ NH4Cl(aq)
Or NH4OH(aq)+HCl(aq)---->NH4Cl(aq)+H2O(l)

Thanks budullewraagh.
We usually eliminate the H2O(l) of both sides, right?
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#14 jdurg

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Posted 3 March 2005 - 04:18 PM

Primarygun- The ionic equation for the reaction between NaOH and HCL is
Na+ + OH- + H+ + Cl- = H2O + NaCl
Half equations
NaOH = Na+ + OH-
HCl = H+ + Cl-

~Scott



That is not correct. The only way that is correct is if the NaCl precipitates out of solution. The ionic equation for NaOH reacting with HCl is
Na+ + OH- + H+ + Cl- -> H2O + Na+ + Cl-

The Net Ionic Equation is
H+ + OH- -> H2O

For the reaction with aqueous NaOH and HCl gas, the reaction is the same as hydrochloric acid and sodium hydroxide. This is because in order for the HCl to react with the ionic NaOH, it has to dissolve in water first. If the NaOH was anhydrous, then you could get a reaction between it and the HCl gas.
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