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Buffer Capacity

AP Chemistry· difficulty 3/5

A buffer is generally effective within

  • A

    Any pH

  • B

    Only at pKa exactly

  • C

    pKa ± 5

  • D

    pKa ± 1

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Explanation

Within pKa ± 1, ratio of components stays between 1/10 and 10 — workable buffer range.

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