Part A

Calculate the pH of a buffer solution that contains 1.25 M CH3NH2 and 0.950 M CH3NH3Cl. (Kb = 4.4×10-4).

pH of buffer =

Part B

80.0 mL of 0.700 M NaOH is added to 250.0 mL of the buffer solution described in Part A. What is the pH of the solution after the NaOH(aq) is added?

pH after NaOH added =

Part C

80.0 mL of 0.850 M HNO3 is added to 250.0 mL of the buffer solution described in Part A. What is the pH of the solution after the HNO3 is added?

pH after HNO3 added =