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Topic: NaHCO3 electrolysis.  (Read 5857 times)

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Offline domulis

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NaHCO3 electrolysis.
« on: June 14, 2007, 06:43:51 AM »
Hi all.

I am interested in making NaOH from NaHCO3.

I tried this: http://www.chemicalforums.com/index.php?topic=15339.0

But this method is too dificult, because my 400 grams mixture was boiling over an hour, ant the glass pot was shaking intensively, there were a lot of small "explosions" while boiling, ant it made a lot of mess, even if i have used the top of it. After all that, when precipitates fell down, i put some HCl in the mixture, ant bubles were coming out (that means that there still were CO3 / HCO3 ions in the mixture).

So will it work? NaHCO3 + H2O (clean, deionised) -(electrolysis)-> NaOH + H2CO3 (H2O + CO2).

What type of glassware I have to use? Is it correct to use U form flask? Simple flask or cup is bad because another reaction may occur: NaOH + H2O + CO2 -> 2NaHCO3.

If this will work, how I can separate H2CO3 from NaOH? Will it all decompose to H2O and CO2 autmatically during electrolysis?

Thanks in advance.

By the way, I don't want to use NaCl electrolysis, because it releases explosive H2 and poisonuos Cl2, which is heavier than air, so it is hard to get rid of it..
« Last Edit: June 14, 2007, 10:40:27 AM by domulis »

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