Sciencemadness Discussion Board

H2so4 from Cuso4

Tiamat - 17-3-2006 at 18:25

Anyone has a good recipe? with electrolysis i mean

Tiamat - 17-3-2006 at 18:26

recipes pls

HNO3 - 17-3-2006 at 18:58

Search, you!

solo - 17-3-2006 at 19:30

Try google and also why do you double post....think you'll get more help that way?.....wrong, so delete one of your posts as it doesn't help and do some foot work yourself then post what you know and still can't understand then you will get some help..........solo

enima - 17-3-2006 at 19:46

Recipe? http://www.bbc.co.uk/food/recipes/

[Edited on 18-3-2006 by enima]

praseodym - 18-3-2006 at 01:39

I sense sarcasm...

rot - 18-3-2006 at 10:39

this is not possible, sulfuric acid is the only acid that can not be displaced from its salts,
becouse in other situations (e.g. Sodium Chloride and Sulfuric acid yields hydrochloric acid). the acid produced has to be less strong than the acid used to displace it from the salt with. sulfuric acid is stronger than hydrochloric, so this works. becouse there is no acid stronger than sulfuric it won't work.

neutrino - 18-3-2006 at 10:40

There was a thread on this over at roguesci.org. As I remember, they got some sulfuric acid by electrolysis of CuSO<sub>4</sub>, but not much.

Odyssèus - 18-3-2006 at 11:36

Isnt there a thread around here somewhere on electrolysis from MgSO4?

hinz - 18-3-2006 at 11:50

Quote:
Originally posted by rot
this is not possible, sulfuric acid is the only acid that can not be displaced from its salts,
becouse in other situations (e.g. Sodium Chloride and Sulfuric acid yields hydrochloric acid). the acid produced has to be less strong than the acid used to displace it from the salt with. sulfuric acid is stronger than hydrochloric, so this works. becouse there is no acid stronger than sulfuric it won't work.


This isn't the whole reality. As far as I know HCl(pKs-6) is a stronger acid than H2SO4 (pKs-3). The thing is that you need an acid with an higher boiling point than the acid you'll liberate. HCl is very volatile so it will leave the reaction system because the concentrated sulfuric acid you use will capture all water. It's also possible to liberate HCl with AHSO4 (A=>alkali metall) which is a weak acid.

On the other hand it won't be possible to liberate phosphoric acid(weaker acid then HCl) from phosphate with HCl because your gaseous HCl will leave your condensor far before the H3PO4 will do.

The_Davster - 18-3-2006 at 11:56

sulfuric from MgSO4: https://sciencemadness.org/talk/viewthread.php?tid=1739#pid1...
sulfuric from CuSO4: http://www.sciencemadness.org/talk/viewthread.php?tid=1186