A 25.00 mL sample of vinegar is diluted with water to a final volume of 250.0 mL. A 25.00 mL portion of the diluted vinegar is then titrated with 0.0998 M NaOH. If 22.43 mL of NaOH is required to reach the equivalence point, what is the original concentration of acetic acid in the vinegar? CH3CO2H(aq) + OH^-(aq) -> CH3CO2^-(aq) + H2O