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February 22, 2026, 03:35:56 am
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Author Topic: Does this exist?  (Read 895 times)  Share 

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kenhung123

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Does this exist?
« on: August 22, 2010, 11:31:23 am »
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SO2+H2SO4=>H2S2O6
Apparently this is a dehydration reaction? (Yes SO2 is intentional not SO3)
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golden

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Re: Does this exist?
« Reply #1 on: August 22, 2010, 12:17:32 pm »
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According to this Powerpoint it exists:
http://srnl.doe.gov/hse_workshop/Gruet%20Electrolyzer%20Performance.pdf

(Page 12).

It shows it like: H2S2O6 -> SO2 + H2SO4
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kenhung123

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Re: Does this exist?
« Reply #2 on: August 22, 2010, 12:25:58 pm »
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Hmm interesting I thought the question had an error. So how is the dehydration?
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golden

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Re: Does this exist?
« Reply #3 on: August 22, 2010, 12:42:40 pm »
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Are you referring to the dehydration reaction with sulfuric acid?
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kenhung123

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Re: Does this exist?
« Reply #4 on: August 22, 2010, 01:20:34 pm »
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The above equation, how is it dehydration?
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pooshwaltzer

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Re: Does this exist?
« Reply #5 on: August 22, 2010, 02:45:49 pm »
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Quote from: kenhung123 on August 22, 2010, 01:20:34 pm
The above equation, how is it dehydration?

Aqueous reactants becoming solid product
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cypriottiger

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Re: Does this exist?
« Reply #6 on: August 22, 2010, 04:25:44 pm »
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Quote from: pooshwaltzer on August 22, 2010, 02:45:49 pm
Quote from: kenhung123 on August 22, 2010, 01:20:34 pm
The above equation, how is it dehydration?

Aqueous reactants becoming solid product

+1
and no water is being produced
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Mao

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Re: Does this exist?
« Reply #7 on: August 22, 2010, 07:36:41 pm »
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I'm not sure that constitutes dehydration. The label hydration and dehydration are regardless of solvent.

I think it's to do with the number of waters inside the molecule. It is known that SO3 + H2O -> H2SO4, which is a hydration reaction (hydration of SO3), and the S in H2SO4 can be thought of as possessing one 'water'. In addition of SO2, the S in H2S2O6 no longer has a whole water, as it will be shared between two S atoms, thus the degree of hydration is lower.

But then, this labeling of organic reactions is rather.. unnecessary.
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kenhung123

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Re: Does this exist?
« Reply #8 on: August 22, 2010, 09:50:24 pm »
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Thanks all for the clairification
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