The PK_a of Acetic Acid, CH₃COOH, Is 4 $\mathrm{CH}_{3} \mathrm{COOH}+\mathrm{H}_{2} \mathrm{O}=\mathrm{H}_{3} \mathrm{O}^{\oplus}+\mathrm{CH}_{3} \mathrm{COO}^{\ominus}$

Multiple Choice

The pK_a of acetic acid, CH₃COOH, is 4.76. What is the value of the equilibrium constant K_eq, for the following equilibrium? [The concentration of water in a dilute aqueous solution is 55 M] $\mathrm{CH}_{3} \mathrm{COOH}+\mathrm{H}_{2} \mathrm{O}=\mathrm{H}_{3} \mathrm{O}^{\oplus}+\mathrm{CH}_{3} \mathrm{COO}^{\ominus}$

A) 3.2 × 10⁷
B) ?3.2 × 10?⁷
C) ?3.2 × 10⁷
D) 3.2 × 10?⁷