# A 42.0 mL sample of a 0.309 M aqueous hydrofluoric acid solution is titrated with a...

###### Question:

A 42.0 mL sample of a 0.309 M aqueous hydrofluoric acid solution is titrated with a 0.340 M aqueous barium hydroxide solution. What is the pH after 11.8 mL of base have been added? pH =

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