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Topic: Chemistry help  (Read 2460 times)

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Offline bryanshore

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Chemistry help
« on: October 24, 2010, 10:02:15 AM »
why is the product precipitated when crude cinnamic acid is poured into a slight excess of concentrated hydrochloric acid solution
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Offline discodermolide

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Re: Chemistry help
« Reply #1 on: October 24, 2010, 12:06:34 PM »
Quote from: bryanshore on October 24, 2010, 10:02:15 AM
why is the product precipitated when crude cinnamic acid is poured into a slight excess of concentrated hydrochloric acid solution

Solubility?
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Offline bryanshore

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Re: Chemistry help
« Reply #2 on: October 24, 2010, 01:01:12 PM »
yeh i kinda guessed that, would be more helpful if someone could explain it in more detail
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Offline bromidewind

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Re: Chemistry help
« Reply #3 on: October 24, 2010, 11:10:25 PM »
I would assume that the reaction of the H+ with the hydroxyl group on the cinnammic acid would form water, and cinnammic acid is only slightly soluble in water (0.4 g/L), causing some of it to precipitate out.

Just my guess though, off the top of my head.
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