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Introduction to Acids and Bases

AP Chemistry· difficulty 3/5

Acid Ka CB HF 7.2e-4 F- CH3COOH 1.8e-5 CH3COO- HCN 6.2e-10 CN-

Which conjugate base is the strongest?

  • A

    F-

  • B

    All are equal

  • C

    CH3COO-

  • D

    CN-

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Explanation

Weaker acid -> stronger conjugate base. HCN has the smallest Ka, so CN- is the strongest conjugate base in the table.

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