(Answered) A 1000 ml sample of a solution of hydrofluoric acid hf is

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A 10.00 mL sample of a solution of hydrofluoric acid, HF, is diluted to 500 mL. A 20.00 mL sample of the diluted solution requires 13.51 mL of a 0.1500 M NaOH solution to be titrated to the equivalence point. What is the molarity of the original HF solution.

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