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Questions and Answers

What is the main purpose of the glass electrode in potentiometric titration?

  • To measure temperature changes
  • To measure the conductivity of the solution
  • To measure the concentration of metal ions
  • To measure pH (H+ concentration) (correct)
  • What is the equation that describes the voltage change of the ideal pH electrode?

  • $\Delta V = 75 \, \text{mV} \times \Delta \text{pH}$
  • $\Delta V = 50 \, \text{mV} \times \Delta \text{pH}$
  • $\Delta V = 59.16 \, \text{mV} \times \Delta \text{pH}$ (correct)
  • $\Delta V = 25 \, \text{mV} \times \Delta \text{pH}$
  • What is the function of the Ag/AgCl reference electrodes in the combined glass electrode?

  • To measure the temperature of the solution
  • To measure the potential across the glass membrane (correct)
  • To measure the concentration of chloride ions
  • To measure the concentration of silver ions
  • What does the Nernst-like equation describe?

    <p>The response of real glass electrodes</p> Signup and view all the answers

    What happens in the ion-exchange equilibrium on the surfaces of a glass membrane?

    <p>H+ replaces metal ions bound to the negatively charged oxygen atoms</p> Signup and view all the answers

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