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September 17, 2014

Homework Help: Chem

Posted by Lena on Sunday, July 26, 2009 at 9:51pm.

stomach wall has a protective lining of mucous that prevent the acid from penetrating the underlying tissues. using asprin too often can damage the stomach wall. Aspirn is a weak carboxlyliic acid with a Ka of 3.2 x 10^-4.

HC8H7O2CO2(aq) <--> H^+(aq) + C8H7O2CO2^-(aq)

Stomach acid has a pH about 1.5. Given the acidity of the stomach, would the aspirn in the stomach fluid be mostly ionized or un-ionized?

I know that weak acid dissociate about 40%. That's all I know. I don't knwo how to answer the question :S

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