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I-12
b)
Use the weak acid dissociation equilibrium and LeChâtelier’s Principle to explain the effect of
adding OH
-
(in the form of the strong base NaOH) to the buffer solution for both the 1st and 2nd pH
unit changes. (1.2 marks)
4.
Calculate the volume of 0.25 M acetic acid that must be added to 150 mL of
0.50 M sodium acetate in order to prepare a buffer solution of pH 5.00. (1.5 marks)
