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August 3, 2015

Homework Help: College Chemistry

Posted by Kyle on Tuesday, March 23, 2010 at 6:22pm.

Amphetamine (C9H13N) is a weak base with a pKb of 4.2.

Calculate the pH of a solution containing an amphetamine concentration of 215 mg/L.

I calculated the molarity as 1.58*10^-3 and the Ka as 1.58*10^-10. I did ICE and i got the pH as 6.3, but it was wrong. Do you know what I did wrong?

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