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Chemistry Forums for Students => Inorganic Chemistry Forum => Topic started by: iheartsludge on October 25, 2011, 09:51:28 AM

Title: 50% H2SO4 precipitates at 50.6F; what precipitates?
Post by: iheartsludge on October 25, 2011, 09:51:28 AM

Hello,

Per MSDS and field experience, 50% (w/w) H2SO4 forms crystals below 50F.

My questions is: what is precipitating?

Thanks.

Rob

Title: Re: 50% H2SO4 precipitates at 50.6F; what precipitates?
Post by: AWK on October 25, 2011, 10:14:57 AM

http://www.homepages.ucl.ac.uk/~ucfbanf/research/sulfuric_acid_hydrates.htm

Title: Re: 50% H2SO4 precipitates at 50.6F; what precipitates?
Post by: iheartsludge on October 25, 2011, 11:43:59 AM

Posted alittle too soon.

It's FeSO4.7H20

We're utilizing recovered H2SO4 and it has a concentration of ~9ppm Fe.

This is why crystals form and do not un-form.