68) A 25.0-mL sample of 0.150 M HN3 is titrated with a 0.150 M NaOH solution. What is the pH after 13.3 mL of base is added? The Ka of HN3 acid is 1.9 × 10-5. A. 4.45  B.1.34  C.3.03  D.4.78  E.4.66

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