A 25.0 mL sample of 0.150 mol L^-1 hydrofluoric acid is titrated with a 0.150 mol L^-1 NaOH solution. What is the pH at the equivalence point? The K_a of hydrofluoric acid is 3.5 × 10^-4. A)10.17 B)10.83 C)3.17 D)7.00 E)8.17

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Quizplus · Accepted Answer

At the equivalence point, the solution contains the salt NaF, which hydrolyzes to form OH⁻ ions, making the solution basic. The pH is calculated using the Kb of F⁻, which is derived from Kw/Ka. The pH at the equivalence point is approximately 8.17.

A 250 ML Sample of 0