Part A: A 50.0-mL volume of 0.15 MHBr is titrated with 0.25 MKOH. Calculate the pH after the addition of 11.0 mL of KOH. Express your answer numerically.
Part B: A 75.0-mL volume of 0.200 M NH3 (Kb=1.8×10-5) is titrated with 0.500 M HNO3. Calculate the pH after the addition of 11.0 mL of HNO3. Express your answer numerically.
Part C: A 52.0-mL volume of 0.35 M CH3COOH (Ka=1.8×10-5) is titrated with 0.40 M NaOH. Calculate the pH after the addition of 15.0 mL of NaOH. Express your answer numerically.