For the Equation , If the Final Concentrations of [H⁺], [CH₃CO₂^?], and [CH₃CO₂H]

Multiple Choice

For the equation $\mathrm { CH } _ { 3 } \mathrm { CO } _ { 2 } ( \mathrm { aq } ) f \mathrm { H } ^ { + } ( \mathrm { aq } ) + \mathrm { CH } _ { 3 } \mathrm { CO } _ { 2 } ^ { - } ( \mathrm { aq } )$ , if the final concentrations of [H⁺], [CH₃CO₂^?], and [CH₃CO₂H] are 0.0014 M, 0.0036 M, and 1.00M respectively the value of K_a is _____.

A) 3.5 ×10^-6
B) 5.0 ×10^-6
C) 1.3×10^-5
D) 4.5×10^-5
E) 8.0 × 10^-5