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Author: Subject: H2S + H2O2 --> ?
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[*] posted on 24-4-2007 at 08:30
H2S + H2O2 --> ?


hi,
would H2O2 oxidize H2S to S or to one of his oxides?

greetz
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woelen
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[*] posted on 24-4-2007 at 11:25


Probably to a whole mix of sulphur compounds, the exact result also depending on pH. You may expect sulphur, sulfate and possibly also traces of sulfite (or sulphur dioxide) and dithionate.



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[*] posted on 24-4-2007 at 13:22


Woelen hit the nail on the head.

The problem is that you're eating up H2S which is automatically going to change the pH unless you use a buffer of sorts. Also some of the products could change the pH (sulphites, sulfur dioxide).




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[*] posted on 25-4-2007 at 04:30


ok,i looked it up in the HoWi....he says that H2O2 will oxidize it only to S, not to SO2 or SO3
thx
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[*] posted on 25-4-2007 at 07:05


Well, my experience is different. I have done quite a few experiments with sulfides, and these can be oxidized to almost everything. I forgot to mention thiosulfate and tetrathionate.

I found it amazing to see how ugly sulphur compounds behave under slightly different experimental condition. It is very hard to obtain a single clean reaction.




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