Problem: A weak acid (HA) has a pKa of 4.236. If a solution of this acid has a pH of 4.226, what percentage of the acid is not ionized? (Assume all H* in solution came from the ionization of HA.) 

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A weak acid (HA) has a pKa of 4.236. If a solution of this acid has a pH of 4.226, what percentage of the acid is not ionized? (Assume all H* in solution came from the ionization of HA.) 

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