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If 29.8 mL of 0.102 M acid with a Ka of 0.000015 is titrated with 0.107 M NaOH solution, what is the pH of the titration mixture at halfway to the equivalence point?

If 27.2 mL of 0.106 M acid with a Ka of 0.000034 is titrated with 0.104 M NaOH solution, what is the pH of the titration mixture after 10.8 mL of base solution is added?

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