Chemical Forums

Chemistry Forums for Students => High School Chemistry Forum => Topic started by: asadc12 on November 26, 2009, 06:26:54 PM

Title: Just a simple question i think ?
Post by: asadc12 on November 26, 2009, 06:26:54 PM

I am just curious how could make Na Cl (salt) ?
My friend told me you could by mixing Sodium Phosphate and Iron chloride.
Can you guys tell me any more ways that I could make Na Cl except Sodium Phosphate and Iron chloride?
a balanced equation would help me understand :)

Title: Re: Just a simple question i think ?
Post by: cth on November 26, 2009, 06:58:15 PM

Weird idea to make kitchen salt.  ::)
It is more expensive to prepare than just buy a kilo from your local store.  :-\

If you want to make some of it anyway, there are many possibilities. The easiest one I can think of is to react hydrochloric acid and sodium hydroxide:
NaOH + HCl  :rarrow: NaCl + H₂O
You have to do this reaction in water (or else, HCl would be a gas). At the end, you need to evaporate water to get your product.

Title: Re: Just a simple question i think ?
Post by: asadc12 on November 26, 2009, 07:08:50 PM

aw I just figured that out :(

Are there any other ways

Title: Re: Just a simple question i think ?
Post by: cth on November 26, 2009, 07:41:11 PM

Yes.
If one of the salts forming is insoluble, it will precipitate. You just have to filter it off and evaporate water to get NaCl.

For example, reactions in water:
* 2NaI + PbCl₂  :rarrow: 2NaCl + PbI₂
PbI₂ has a low solubility in water. So you filter it out and you're left with salty water (and still some traces of Pb₂).
* Na₂SO₄ + BiCl₂  :rarrow: 2NaCl + BiSO₄
BiSO₄ will precipitate.
* Na₂(oxalate) + CaCl₂  :rarrow: 2NaCl + Ca(oxalate)
Calcium oxalate is damn insoluble in water.

If you don't want to use water, you can use sodium metal or hydride:
* Na⁰ + Cl₂  :rarrow: 2NaCl
This reaction is between a solid and a gas, so it will react only at the sodium surface.
* NaH + HCl  :rarrow: NaCl + H₂
Hydrogen is a gas that just flies away
* NaNH₂ + HCOCl  :rarrow: NaCl + HCONH₂
You could use an acyl chloride and sodium amide.

There are many many other ways. But the easiest way is to go buy it. No bother making it  ;D

Title: Re: Just a simple question i think ?
Post by: 408 on November 26, 2009, 07:46:12 PM

Benzene diazonium chloride + Ethylsodium
C6H5N2Cl +NaC2H5--> NaCl + C6H5C2H5

hydrazinium chloride + NaOH
N2H5Cl +NaOH-->N2H2 +NaCl +H2O

1-chlorobutane + sodium nitrite
C4H9Cl+NaNO2--> C4H9NO2 +NaCl

2 Sodium azide + cyanogen chloride
2NaN₃ + CNCl  --> NaCl + NaCN₇  ;) (yes, CN₇ is correct before anyone asks)

2Na +Cl2--> 2NaCl

Possibilities are infinite

Title: Re: Just a simple question i think ?
Post by: cth on November 27, 2009, 09:37:42 AM

Quote from: 408 on November 26, 2009, 07:46:12 PM

2 Sodium azide + cyanogen chloride
2NaN₃ + CNCl  --> NaCl + NaCN₇  ;) (yes, CN₇ is correct before anyone asks)

NaCN₇?!  :o :o :o
I've never seen this one before, and it looks interesting. What is its structure?


I tried to guess:
CNCl + N₃^- will form a 5-chloro-tetrazolate compound, like the picture of a tetrazole ring below with one added chlorine attached on the carbon.

(https://www.chemicalforums.com/proxy.php?request=http%3A%2F%2Fwww.adeviq-spin.com%2Ftetrazole.gif&hash=d30b6a566aecd7f748f2e90cc8185c79fe0bf1b1)tetrazole ring

But then, I don't see where a second N₃ would react to form CN₇^-. I couldn't find it in SciFinder.

Thanks for this unusual compound  :D

Title: Re: Just a simple question i think ?
Post by: 408 on November 27, 2009, 01:08:22 PM

Azidotetrazole, a sexy beast of a compound.  :-*  :-*  :-*  :-*

First equiv of azide makes cyanogen azide
second equiv cyclizes to azidotetrazole.

 ;D :D ;D :o ;D :D ;) :)

Title: Re: Just a simple question i think ?
Post by: 408 on November 27, 2009, 02:07:30 PM

http://pubs.acs.org/doi/abs/10.1021/ja8077522

Title: Re: Just a simple question i think ?
Post by: cth on November 27, 2009, 05:51:47 PM

Nice, thank you. I see I had guessed half of the compound.  8)

It would be nice to use as a ligand to complex transition metals, but its instability is a big problem. Nevermind, it keeps me thinking about ligands possibilities. :)

Title: Re: Just a simple question i think ?
Post by: 408 on November 27, 2009, 06:21:47 PM

Nitrotetrazole exists as a ligand in many metal complexes

Ex :
Fe(NT)6 (4-) (sodium and ammonium salts)
Co(NH3)4(NT)2 ClO4 "BNCP"
Both are primary explosives of high quality. ;)

Azidotetrazole complexes likely far too unstable :'(
Even when large alkyl chains are hung off azidotetrazole, it is still exceeding impact, friction and spark sensitive, and this is after severely diluting the nitrogen content.

General trend for 5-substituted tetrazole explosiveness: more electron withdrawing, more sensitive :)

N2+ (explode above 2% concentration in aqueous solution :'( ) >N3 > NO2  >NNO2 >NH2

 :D