In the Reaction HC₂H₃O₂ ⇌ H⁺ + C₂H₃O₂^- , If

Multiple Choice

In the reaction HC₂H₃O₂ ⇌ H⁺ + C₂H₃O₂^- , if [HC₂H₃O₂] = 1.0 × 10^-6 M and the pH = 4.0, what will K be?

A) 1.0 × 10^-8
B) 0.10
C) 0.01
D) 1.0 × 10^-4