Sample Problem 19.1
Calculating the effect of added H3O+ and OH- on buffer pH
PROBLEM:
Calculate the pH of the following solutions.
(a) A buffer solution consisting of 0.50 M CH3COOH and 0.50 M CH3COONa
(b) After adding 0.020 mol of solid NaOH to 1.0 L of the buffer solution in part (a)
(c) After adding 0.020 mol of HCl to 1.0 L of the buffer solution in part (a)
Ka of CH3COOH = 1.8 x 10-5 (assume the additions cause negligible volume changes)
0.50
+ x
0.50 - x
-
-
-
0.50
0
+ x
0.50 + x
x
- x
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