If a Small Amount of a Strong Acid Is Added

question 13

Multiple Choice

If a small amount of a strong acid is added to buffer made up of a weak acid,HA,and the sodium salt of its conjugate base,NaA,the pH of the buffer solution does not change appreciably because

• A)the K_a of HA is changed.
• B)the strong acid reacts with A^- to give HA,which is a weak acid.
• C)no reaction occurs.
• D)the strong acid reacts with HA to give H₂A⁺.
• E)the strong acid reacts with A^- to give H₂A⁺.

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