vampirexevipex
Hazard to Self
Posts: 62
Registered: 22-2-2012
Location: Puerto Rico
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Mood: Happy 
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sepparation of sodium hydroxide and calcium carbonate
Hello i recently made sodium hydroxide by mixing calcium hydroxide and sodium carbonate, now i need to separate it, but since both compounds are water
soluble, i need help here. So any effective way of separation that doesnt involve crystallization?
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Hexavalent
International Hazard
Posts: 1564
Registered: 29-12-2011
Location: Wales, UK
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Your question is not very clear.
I assume you went;
Ca(OH)2 + Na2CO3 --> 2NaOH + CaCO3
Under which circumstances, assuming you used correct stoichiometry and using proper mole/mass equivalents, all that you will be left with is the
sodium hydroxide, which is very soluble, and calcium carbonate, which is virtually insoluble.
So, you could just add water - the sodium hydroxide will dissolve and leave the CaCO3 at the bottom as a precipitate, which can either have the liquid
decanted off it or have the entire thing filtered.
[Edited on 20-4-2012 by Hexavalent]
"Success is going from failure to failure without loss of enthusiasm." Winston Churchill
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