Consider the following reaction of benzoic acid:
C₆H₅COOH(aq) + H₂O(l) ⇌ C₆H₅COO⁻(aq) + H₃O⁺(aq)
Kₐ = 6.31 × 10⁻⁵
If there is 0.667 M C₆H₅COOH, what is the pH of the solution?