Question: A buffer solution contains 0.350 M hydrofluoric acid and 0.390 M sodium fluoride . If 0.0353 moles of nitric acid are added to 250 mL

A buffer solution contains 0.350 M hydrofluoric acid and 0.390 M sodium fluoride.

If 0.0353 moles of nitric acid are added to 250 mL of this buffer, what is the pH of the resulting solution ?
(Assume that the volume does not change upon adding nitric acid)

pH = ?

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