Barrons SAT Subject Test Chemistry, 13th Edition

(Marvins-Underground-K-12) #1

  1. (D) When HA ionizes, it forms equal amounts of H+ and A− ions, but these
    amounts are very small because the Ka is very small. Ka can be expressed as
    [H+] [A−]/[HA]. Because you are told to assume [HA] = 1, you have:

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