Buffer Properties

Which of the following has (have) buffer properties?

I. 50 mL of .1 M HCl

II. 100 mL of .1 M acetic acid

III. 50mL of .1 M NaOH

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Reveal Answer »

D.

By mixing a weak acid with NaOH, we convert some of the acetic acid to acetate. The resulting mixture of the acid and its conjugate base is a buffer, and [H+] will be within an offer of magnitude of Ka.

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