\( \mathrm{K}_{\mathrm{a}} \) for hydrofluoric acid is \( 6.9 \times 10^{-4} \). What is the equ....

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\( \mathrm{K}_{\mathrm{a}} \) for hydrofluoric acid is \( 6.9 \times 10^{-4} \). What is the
\( \mathrm{P} \)
equilibrium constant \( \mathrm{K} \) for the following reaction?
W
\[
\mathrm{F}_{(\text {aq. })}^{-}+\mathrm{H}_{2} \mathrm{O}_{(\mathrm{l})} \rightleftharpoons \mathrm{HF}_{(\text {aq. })}+\mathrm{OH}^{-}{ }_{\text {(aq.) }}
\]
(1) \( 6.9 \times 10^{-11} \)
(2) \( 1.4 \times 10^{-11} \)
(3) \( 2.6 \times 10^{-9} \)
(4) \( 8.3 \times 10^{-6} \)


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