Ionization of Water and Body Buffers Quiz
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Questions and Answers

What is the role of water in cellular functions?

  • To provide energy for cellular processes
  • To maintain the pH balance in cells (correct)
  • To prevent the ionization of weak acids and bases
  • To act as a solvent for various cellular components

    • How can weak acids contribute to the hydrogen ion concentration in a solution?

  • By consuming hydrogen ions through protonation
  • By donating hydrogen ions through ionization (correct)
  • By neutralizing the hydrogen ions in the solution
  • By preventing the formation of hydrogen ions

    • What can be used to describe the position of equilibrium of any chemical reaction?

  • Equilibrium constant (correct)
  • Equilibrium density
  • Equilibrium weight
  • Equilibrium volume

    • Which ions are yielded through the reversible ionization of water?

    <p>Hydrogen ions (H+) and hydroxide ions (OH− )</p> Signup and view all the answers

    What is expressed as the pH of a solution?

    <p>Total hydrogen ion concentration</p> Signup and view all the answers

    What is the equilibrium constant for the reversible ionization of water at 25°C?

    <p>1.8 × 10−16 M</p> Signup and view all the answers

    How is the pH of a solution defined?

    <p>As the negative logarithm of the concentration (in moles/litre) of hydrogen ions</p> Signup and view all the answers

    What does it mean when the solution is said to be at neutral pH?

    <p>The concentration of (H+ ) and (OH− ) are exactly equal</p> Signup and view all the answers

    What does the ion product of water, Kw, define?

    <p>The actual concentration of ( H+ )(and thus of OH−) in any aqueous solution</p> Signup and view all the answers

    How is the pH scale defined?

    <p>A scale for expressing the (H+ ) concentration in moles/litre</p> Signup and view all the answers

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