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+ Determining the pH of a Weak Base and the Percent lonization of a Weak Acid 26 of 30 MI Review | Constants Periodic Table The pKt of pyridine is 8.75. What is the pH of a 0.105 M solution of pyridine? (Assume that the temperature is 25°C.) Express the pH numerically to two decimal places. View Available Hint(s) Unlike strong acids and bases that ionize completely in solution, weak acids or bases partially ionize. The tendency of a weak acid or base to ionize can be quantified in several ways including pH = 9.14 Sube Previous Answers K, or Ky • pÃ, or pKb • and percent ionization* ✓ Correct *This assumes that species of equal concentrations are being compared as percent ionization is affected by concentration Part B Benzoic acid is a weak acid that has antimicrobial properties. Its sodium salt, sodium benzoate, is a preservative found in foods, medications, and personal hygiene products. Benzoic acid ionizes in water: CHCOOH-CH,COO- + H The pK, of this reaction is 4.2. In a 0.54 M solution of benzoic acid, what percentage of the molecules are ionized? Express your answer to two significant figures and include the appropriate units. View Available Hint(s) HA 0 ? % lonization = Value Units Submit