Aspirin (C 9H 8O 4) is a weak monoprotic acid (K a = 3.3 x 10-4). You are analyzing a sample for a pharmaceutical company with a quantitative titration and dissolve 10 tablets, each containing 200 mg of aspirin, in 150 mL of water. a) Determine the pH of this solution. b) Determine the pH of the solution after you have added 20.0 mL of 0.500 M NaOH.

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.