Electrochemistry Basics
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Questions and Answers

What is the primary function of a potentiostat in an electrochemical reaction?

  • To measure the resulting current
  • To regulate the energy of the electrons in the electrode (correct)
  • To initiate the chemical reaction
  • To control the flow of reactants

    • What is the y-axis typically labeled as in a cyclic voltammetry graph?

  • Resulting current (i) (correct)
  • Time of reaction
  • Energy of the electrons
  • Applied potential (E)

    • What is the difference between a chemical reduction and an electrochemical reduction?

  • The energy of the electrons involved
  • The presence of an electrode (correct)
  • The type of reactant used
  • The rate of the reaction

    • What is the purpose of imposing a cyclic voltammetry on an electrochemical system?

    <p>To control the electrode potential</p> Signup and view all the answers

    What is the significance of the sign convention used in reporting CV data?

    <p>It affects the interpretation of the resulting current</p> Signup and view all the answers

    What is the difference between homogeneous and heterogeneous reduction of ferrocenium?

    <p>The phase of the reactants</p> Signup and view all the answers

    What determines the amount of Ox available for reduction in the CrEr mechanism?

    <p>The equilibrium constant of the first step</p> Signup and view all the answers

    What can be extracted from voltammograms in certain cases?

    <p>The equilibrium constant</p> Signup and view all the answers

    What is the result of a large equilibrium constant in the CrEr mechanism?

    <p>A completely reversible voltammogram</p> Signup and view all the answers

    What is the focus of quantitative electrochemical analysis?

    <p>Exploring the electron transfer reactions underlying renewable energy technologies</p> Signup and view all the answers

    What is the significance of the voltammogram in the CrEr mechanism?

    <p>It reflects the reversibility of the reaction, which is influenced by the equilibrium constant</p> Signup and view all the answers

    What is the benefit of utilizing electrochemistry in research?

    <p>It is a powerful tool for exploring the electron transfer reactions underlying renewable energy technologies</p> Signup and view all the answers

    What is the purpose of a reference electrode in an electrochemical cell?

    <p>To maintain a constant potential independent of the electrolyte used</p> Signup and view all the answers

    What is the advantage of using an AgCl/Ag electrode as a reference electrode?

    <p>It eliminates the possibility of silver salts leaks</p> Signup and view all the answers

    What is the purpose of the porous frit in an electrochemical cell?

    <p>To separate the reference electrode from the solution</p> Signup and view all the answers

    Why is it important to match the solvent and electrolyte in the reference compartment to the one used in the experiment?

    <p>To minimize junction potentials</p> Signup and view all the answers

    What occurs when a potential is applied to the working electrode such that reduction or oxidation of the analyte can occur?

    <p>The current flow between the working electrode and the counter electrode increases</p> Signup and view all the answers

    What is the purpose of the counter electrode in an electrochemical cell?

    <p>To complete the electrical circuit</p> Signup and view all the answers

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