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April 19, 2014

Homework Help: ap chem

Posted by Jaron on Thursday, March 22, 2007 at 4:49pm.

A 9.00 M solution of a weak acid, HA, has a pH of 1.30

1.) calculate [A-] at equilibrium

2.) calculate [HA] at equilibrium

Use pH to get (H^+).
Ka = (H^+)(A^-)/(HA)
(A^-) = (H^+).
(HA) = 9
Plug and chug.
Post your work if you get stuck.

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