A 27.00 mL volume of a monoprotic acid is titrated with 0.1723 M sodium hydroxide (NaOH). If 38.45 mL NaOH are required to reach the equivalence point, what was the original molar concentration (mol/L) of the acid?  The reaction of the acid and the NaOH is:HA + NaOH = A- + H+ + H2O   I got 0.2454 mol/L. Is that wrong?

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