involve titrating a 100.0 mL sample of 0.20 M HF is titrated with 0.10 M KOH. The Ka of HF is 3.5 × 10-4. pKa = 3.46 55. Determine the pH of the solution after the addition of 400.0 mL of KOH. The Ka of HF is 3.5 × 10-4. A. 13.08 B. 12.60 C. 13.85 D. 12.30 E. 12.78

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