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

question 96

Multiple Choice

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

• A)HA + OH^- \(\leftrightarrows\) H₂O + A^-
• B)HA + H₂O \(\leftrightarrows\)H₃O⁺ + A^-
• C)HA + H₃O⁺ \(\leftrightarrows\) H₂A⁺ + H₂O
• D)HA + H₂A⁺ \(\leftrightarrows\) H₂A⁺ + HA
• E)H₃O⁺ + A^- \(\leftrightarrows\) HA + H₂O

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