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Author: Subject: H2SO4 from CU2SO4 and HCl
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[*] posted on 18-12-2002 at 15:18
H2SO4 from CU2SO4 and HCl

I am just wondering what the specifics of this reaction might be( i.e. heat, air pressure, risks involved, distillation) and if it would work at all.
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[*] posted on 18-12-2002 at 17:22


That won't work. H2SO4 is significantly less volatile than HCl, and H2SO4 is the stronger acid. You could get a solution of hydronium, sulfate, chloride, and Cu2+ ions from that, but not sulfuric acid.



I weep at the sight of flaming acetic anhydride.
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[*] posted on 18-12-2002 at 17:58


k, thanks
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Nick F
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[*] posted on 1-1-2003 at 11:38


Unless...

What do you suppose would happen if you passed dry HCl over hot CuSO4 under distilation? Might you get some H2SO4 coming over with the excess HCl, from which it could be easily seperated?

Of course, it would be easier to buy it :).
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[*] posted on 1-1-2003 at 11:42


That would work if one was willing to part with *lots* of anhydrous HCl.

pKa HCl = -7
pKa H2SO4 = -9



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LanthanumK
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[*] posted on 29-6-2011 at 08:17


Isn't a solution of H3O+ and SO4(2-) the same as a dilute sulfuric acid solution?



hibernating...
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barley81
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[*] posted on 29-6-2011 at 08:33


Yes, if there is nothing else in solution.
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[*] posted on 29-6-2011 at 08:45


Dilute aqueous suphuric acid and hydrochloric acid are the same pH (1) as they are levelled down by the water.
When you add sodium chloride to concentrated sulphuric acid the chloride ions are protonated by the stronger sulphuric acid, warming it drives the reaction forward as hydrogen chloride is lost as a gas.
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