symboom - 18-4-2011 at 19:12
reaction of urea and sodium hydroxide what is the reaction
(NH2)2CO(aq) + 2NaOH(aq) > NaCO3(aq)+ NH3(g)? does this reaction exist
i have left over urea from using it and need very pure sodium carbonate
Sedit - 18-4-2011 at 19:18
I dunno about all this but get FOOD GRADE bicarbonate and heat it till you aquire the carbonate. What a waste that whole reaction would be.
blogfast25 - 19-4-2011 at 01:33
Na2CO3 is really so dirt cheap and abundantly available that any procedure to try and home make it would be a waste of time. Hardware store grade
Na2CO3 can be recrystallised twice very easily to high purity, then dehydrated by heating if you need the anhydrous material.
redox - 19-4-2011 at 05:06
Na2CO3 is also used as a pH up for swimming pools. As blogfast said, recrystallization would be necessary.
[Edited on 19-4-2011 by redox]
ScienceHideout - 21-4-2011 at 07:08
What a waste... Why waste your time turning expensive reagents into a cheap chemical?
symboom - 24-4-2011 at 05:19
because i made the sodium hydroxide myself it was cheaper (hence shiping costs and its easier to buy in bulk)through electrolysis of sodium sulfate
(that i got from making HCl acid with salt)through a water permeable membrane to yield sulfuric acid and sodium hydroxide solution and i can also use
the ammonia to make purer ammonium hydroxide
yes i know it is just easier to buy the reagents but i am an experimenter
this is done more out of curiosity and the see if i can do it.
Lambda-Eyde - 24-4-2011 at 05:26
If you're goint to do an experiment out of curiousity, then make something you can't buy at the washing aisle! 
Seriously, washing soda, pH+ for swimming pools, etc is extremely cheap and abundant!
[Edited on 24-4-2011 by Lambda-Eyde]
12332123 - 24-4-2011 at 09:50
CO(NH2)2 ⇌ NH4OCN
NH4OCN + NaOH = NH3 + H2O + NaOCN
2 NaOCN + 3 H2O = 2 NH3 + Na2CO3 + CO2
This is doable, but really, why bother?
bfesser - 24-4-2011 at 10:23
What happened to <strong>the <em>art</em> and <em>science</em> of amateur experimentalism.</strong> If you have
nothing better to say than 'just go buy it', why reply?
ScienceSquirrel - 24-4-2011 at 12:42
The aim of preparative chemistry is to convert cheap and readily available materials in to more expensive materials that may be hard or impossible to
obtain.
Sodium carbonate is readily and cheaply available in reasonable purity.
Very pure material may be made by heating food or pharmaceutical grade sodium bicarbonate. It readily decomposes to form sodium carbonate, water and
carbon dioxide.
This site is about the art and science of amateur experimentalism but as scientists we should keep common sense in
mind!
symboom - 24-4-2011 at 19:34
i already know that i can buy sodium carbonate yes it is very cheap considering how i got my sodium hydroxide from seashells from the lake(calcium
carbonate decomposition to calcium oxide and sodium bicarbonate to carbonate) by using my Fresnel lens it reaches 3000F easily so its no problem to
produce it. im fine with using NaOH i can just get more seashells
and i needed some pure ammonium hydroxide too
[Edited on 25-4-2011 by symboom]