CH₃COOH(aq)+H₂O(l)⇄H₃O+(aq)+CH₃COO⁻ (aq)
CH₃COO⁻ (aq)+H₂O(l)⇄CH₃COOH(aq)+OH⁻ (aq)
2H₂O(l)⇄H₃O+(aq)+OH−(aq)
A buffer solution is made up of acetic acid (CH₃COOH) and sodium acetate (NaCH₃COO). The major equilibria in the buffer system are represented above. Which of the following equilibria could be used to support the claim that the addition of a small amount of NaOH to the buffer will result in only a very small change in pH?
A.CH₃COOH(aq)+CH₃COO⁻(aq)⇄CH₃COO⁻ (aq)+CH₃COOH(aq)
B. CH₃COOH(aq)+OH⁻ (aq)⇄CH₃COO⁻ (aq)+H₂O(l)
C. H₃O+(aq)+OH⁻ (aq)⇄2H₂O(l)
D. CH₃COOH(aq)+H₂O(l)⇄H₃O+(aq)+CH₃COO⁻(aq)