V09_Institute of Materials in Electrical Engineering 1 - Helmholtz-Theory (1878) Quiz
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Questions and Answers

Which part of the Helmholtz Layers consists of dehydrated ions that are completely immobilized?

  • Both Inner and Outer Helmholtz Layers
  • None of the layers
  • Inner Helmholtz Layer (correct)
  • Outer Helmholtz Layer
  • What is the term Ψ in the context of Solid-Liquid Interface?

  • Dielectric constant of vacuum
  • Relative dielectric constant
  • Electrical double layer charge density
  • Electrical double layer potential (correct)
  • What type of ions are present in the Outer Helmholtz Layer?

  • Dehydrated ions
  • Mobile ions
  • Immobile ions
  • Hydrated ions (correct)
  • What aspect is NOT included in the Helmholtz Theory?

    <p>Diffusion effects</p> Signup and view all the answers

    What is the formula for the areal capacity CH of the Helmholtz layer?

    <p>CH = εε0d</p> Signup and view all the answers

    In the context of Helmholtz theory, what does the dielectric constant ε represent?

    <p>Dielectric constant of vacuum</p> Signup and view all the answers

    For which type of electrolytes is the theory of Helmholtz layers applicable?

    <p>Highly concentrated</p> Signup and view all the answers

    What is the significance of the distance 'd' in the Helmholtz layer formula CH = εε0d?

    <p>It is the distance from the electrode to the outer place of dissolved ions</p> Signup and view all the answers

    What parameter is indicated by the width dHelmholtz = 0.2 nm in the example given?

    <p>Thickness of a monolayer</p> Signup and view all the answers

    Which layer in the Electrical Double Layer (EDL) model consists of immobile charged ions strongly bonded to the surface?

    <p>Helmholtz layer</p> Signup and view all the answers

    What is the primary driving force behind electroosmotic flow in microfluidic systems?

    <p>External electric field</p> Signup and view all the answers

    In the context of the solid-liquid interface, what does the $\zeta$-potential represent?

    <p>The potential at the slipping plane</p> Signup and view all the answers

    Which of the following factors does NOT influence the $\zeta$-potential at the solid-liquid interface?

    <p>Atmospheric pressure</p> Signup and view all the answers

    In the Gouy-Chapman-Stern model of the EDL, which region represents the diffuse layer of mobile ions?

    <p>Gouy-Chapman layer</p> Signup and view all the answers

    What is the primary advantage of electroosmotic flow in microfluidic systems compared to pressure-driven flow?

    <p>Plug-like velocity profile</p> Signup and view all the answers

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