Exercise 1 | Buffers and Titration of Acids and Bases

Calculate the pH of a solution that is 0.200 M in ammonia NH3 and 0.300 M in ammonium chloride NH4Cl.


Data: Ka (NH4+/NH3) = 5.62 x 10-10

Henderson-Hasselbalch equation can be used:


pH = pKa + log base0acid0

pH = -log (5.62 x 10-10) + log 0.2000.300

pH = 9.07