The active ingredient in aspirin is acetylsalicylic acid. A 2.08 g sample of acetylsalicylic acid required 23.06 mL of 0.5007 M NaOH for complete reaction. Addition of 13.02 mL of 0.4434 M HCl to the flask containing the aspirin and the sodium hydroxide produced a mixture with pH = 3.48. Find the molar mass (in g/mol) of acetylsalicylic acid and its Ka value. Acetylsalicylic acid is a monoprotic acid.

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