The acid ionization equilibrium constant,K_a,describes which of the following reactions (where HA is a generic weak acid)?

Question

Quizplus · Accepted Answer

The acid ionization equilibrium constant, K_a, describes the equilibrium between the weak acid (HA) and its conjugate base (A-), where HA donates a proton to water (H2O) to form H3O+ and A-. In choice B, HA reacts with water to form H3O+ and A-. This reaction is represented by the equation: HA + H2O ⇌ H3O+ + A- The equilibrium constant expression for this reaction is: K_a = [H3O+][A-]/[HA] Therefore, choice B correctly represents the acid ionization equilibrium constant, K_a. The other choices do not represent this equilibrium constant or include incorrect reactants/products.

The Acid Ionization Equilibrium Constant,Ka,describes Which of the Following Reactions ⇆\leftrightarrows⇆

The Acid Ionization Equilibrium Constant,K_a,describes Which of the Following Reactions $\leftrightarrows$