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If \( \mathrm{pK} \mathrm{K}_{\mathrm{b}} \) for fluoride ion at \( 25^{\circ} \mathrm{C} \) is 10.3 , the ionization
P constant of hydrofluoric acid in water at this

W temperature is
(1) \( 8 \times 10^{-7} \)
(2) \( 2 \times 10^{-4} \)
(3) \( 3.52 \times 10^{-3} \)
(4) \( 5.38 \times 10^{-2} \)
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