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Buffering Action

APCHEM-7JQLLE

Which of the following will destroy the buffering action of 1.0 L of 0.1 M hydrofluoric acid and 0.05 M sodium fluoride buffer?

A

Adding 0.06 mol of $HCl$.

B

Adding 0.06 mol of $NaF$.

C

Adding 0.06 mol of $NaOH$.

D

Adding 0.06 mol of $HF$.