Three buffers are made by combining a 1 M solution of acetic acid with a 1 M solution of sodium acetate in the ratios shown below.
|
1 M Acetic acid |
1 M sodium acetate |
|
|
Buffer 1: |
10 mL |
90 mL |
|
Buffer 2: |
50 mL |
50 mL |
|
Buffer 3: |
90 mL |
10mL |
Which of these statements is true of the resulting buffers?
1
pH of buffer 1 < pH of buffer 2 < pH of buffer 3
2
pH of buffer 1 = pH of buffer 2 = pH of buffer 3
3
pH of buffer 1 > pH of buffer 2 > pH of buffer 3
4
The problem cannot be solved without knowing the value of pka