charkol3
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Sodium acetate in an aluminum container
What the heck did I make? Sorry to do this for a first post.
I had finally gotten around to attempt the famous hot ice trick with sodium acetate. I wanted to do it the long way by trying to make my own sodium
acetate from NaOH and viniger. But I didn't get to boiling down the sodium acetate solution.
I transfered the solution into a small thin aluminum baking sheet, it was cheap and available and i had not much pyrex on hand to use, then instantly,
the fizzing began. Very enthusiastic fizzing. The sodium acetate solution was eating through the aluminum like a scary movie.
Original equation:
NaOH + CH3CO2 --> H2O + NaOCOCH3
Do the acetate ions prefer the Al(3+) or the Na(1+)
Aluminum acetate comes in 3 different varieties. Tri, di, and mono. The solution was basic, very slippery. What might have happened?
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Panache
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lol, Al+OH----->disaster, use a stainless baking tray and only neutralise your vinegar don't basify it.
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simba
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In short, the excess of NaOH you added to the mixture is making NaAlO2 out of your container.
[Edited on 24-6-2011 by shivas]
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LanthanumK
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and H2 gas.
hibernating...
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AJKOER
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Remember Vinegar solution is dilute acetic acid (assume 5%), recalculate required amount of NaOH (assume 100% pure) and put in an excess of vinegar.
With time (days) however, the Al baking sheet may still to dissolve as the solution attacks the protective Al2O3 coat, and permits a reaction between
Al and H2O generating H2.
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LanthanumK
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Doesn't that reaction happen too slowly to be significant?
hibernating...
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Bot0nist
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Why not use sodium bicarbonate? Baking soda is a lot easier to work with than lye.
U.T.F.S.E. and learn the joys of autodidacticism!
Don't judge each day only by the harvest you reap, but also by the seeds you sow.
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charkol3
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Not this baking sheet supposedly. The fizzing began immediately, as well as significant heat emission. I used "Hefty EZ Foil Loaf Pans". They are
the one time use ones. Within 5 minutes of fizzing, the bottom had melted and the pan material itself was dripping when I picked it up.
And to Bot0nist,
I used lye because i was thinking since NaOH has a higher concentration density of Na. And I had some lye on hand to play with.
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