I got this question wrong and I don't know why?
I chose 3
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 10 mL
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. The problem cannot be solved without knowing the value of pKa.
4. pH of buffer 1 < pH of buffer 2 < pH of buffer 3
5. None of the answers are correct.
I chose 3
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 10 mL
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. The problem cannot be solved without knowing the value of pKa.
4. pH of buffer 1 < pH of buffer 2 < pH of buffer 3
5. None of the answers are correct.