Question: chem d. 6.0 e. 7.0pH=log[H3O] ? 11. An aqueous solution of a weak acid, HA, is titrated with NaOH solution. The pH at the midpoint

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d. 6.0 e. 7.0pH=log[H3O] ? 11. An aqueous solution of a weak acid, HA, is titrated with NaOH solution. The pH at the midpoint of the buffer region is 4.5. What is the Ka of the acid? a. 3.2105 b. 3.21010 c. 1.8103 d. 7.0107 e. 4.5

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