What is the pH of a 0.225 M solution of CH3NH2 (aq), for which Kb = 4.4 X 10 . 2. A buffer is prepared from 550 mL 0.250 M CH3COOH and 1.25 g NaOH (s). What is the pH of the buffer? Assume the volume does not change when the solid is added.

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