Diffusion and Fick’s Law Quiz
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Questions and Answers

What does Fick's law describe?

  • The flux of ions in an electrolyte
  • The rate of material passing through a plane unit area
  • The diffusion of materials due to random thermal movement of molecules (correct)
  • The relationship between concentration gradient and direction

What does the Nernst-Planck equation describe?

  • The flux of ions in an electrolyte, combining migration, diffusion, and convection terms (correct)
  • The relationship between molar flux and diffusion coefficient
  • The behavior of electrical potential gradients in a galvanic cell
  • The contribution of ions to cell voltage

What does the migration term in the Nernst-Planck equation describe?

  • The relationship between charge of species and mobility
  • The relationship between concentration gradient and direction
  • The movement of ions from high concentration to low concentration
  • The contribution in behavior from the electrical potential gradients (correct)

When can the Nernst-Planck equation be used?

<p>For low concentrate solutions, where solvent-ion predominance is observed (D)</p> Signup and view all the answers

What is the expression for cell voltage as a function of various overpotentials in a galvanic cell?

<p>$V_{cell}=U_{cell}-Ση$ (D)</p> Signup and view all the answers

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