Chemistry: Ionization of Water and pH Calculation
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Questions and Answers

Which of the following statements best describes the role of buffers in biochemical processes?

  • Buffers increase the rate of chemical reactions by lowering activation energy.
  • Buffers maintain a constant pH by resisting changes in hydrogen ion concentration. (correct)
  • Buffers catalyze the breakdown of complex molecules into simpler ones.
  • Buffers facilitate the denaturation of proteins by disrupting hydrogen bonds.

    • The Henderson-Hasselbalch equation relates the pH of a buffer solution to which of the following?

  • The molar mass of the buffer components and the volume of the solution.
  • The pressure of the system and the stoichiometric ratio of the buffer components.
  • The temperature of the solution and the ionic strength of the buffer components.
  • The concentration of the conjugate acid and base, and the dissociation constant of the acid. (correct)

    • Which of the following statements accurately describes the behavior of a buffer system?

  • A buffer system decreases the pH of a solution when a strong base is added.
  • A buffer system maintains a constant pH regardless of the addition of strong acids or bases.
  • A buffer system can resist changes in pH within a specific range, but not indefinitely. (correct)
  • A buffer system increases the pH of a solution when a strong acid is added.

    • In biochemical processes, what is the primary function of maintaining a specific pH range?

    <p>To optimize the activity and stability of enzymes and other biomolecules.</p> Signup and view all the answers

    Which of the following statements accurately describes the relationship between pH and hydrogen ion concentration $[H^+]$?

    <p>pH is the logarithm of $[H^+]$.</p> Signup and view all the answers

    In a buffered solution, which of the following pairs of components are typically present?

    <p>A weak acid and its conjugate base.</p> Signup and view all the answers

    Which of the following statements accurately describes the behavior of an unbuffered solution when a strong acid is added?

    <p>The pH decreases proportionally to the amount of acid added.</p> Signup and view all the answers

    Which of the following factors can affect the capacity of a buffer system to resist changes in pH?

    <p>All of the above.</p> Signup and view all the answers

    In biochemical processes, which of the following statements accurately describes the role of pH?

    <p>pH affects the ionization state and activity of enzymes and other biomolecules.</p> Signup and view all the answers

    Which of the following statements accurately describes the relationship between a buffer system and the Henderson-Hasselbalch equation?

    <p>The Henderson-Hasselbalch equation relates the pH of a buffer system to the concentrations of its components.</p> Signup and view all the answers

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