Unit 2: Electrochemical Cells and Ionic Solutions
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Questions and Answers

What is the Nernst equation used for in the context of electrochemical cells?

  • Deriving the relation between Gibbs energy of cell reaction and standard potential
  • Determining the standard potential of the cell
  • Calculating the emf of the galvanic cell (correct)
  • Calculating the equilibrium constant of the cell

    • Which type of cell uses electrical energy to carry out non-spontaneous chemical reactions?

  • Electrolytic cell (correct)
  • Fuel cell
  • Primary cell
  • Galvanic cell

    • What does resistivity (r) measure in the context of ionic solutions?

  • Ability to conduct electricity
  • Concentration of ions
  • Amount of charge transferred
  • Opposition to the flow of current (correct)

    • What does molar conductivity at zero concentration or infinite dilution (✆m) represent?

    <p>Maximum conductivity of the solution</p> Signup and view all the answers

    What does Kohlrausch law describe in relation to molar conductivity?

    <p>Decrease in molar conductivity with increasing concentration</p> Signup and view all the answers

    Which type of cell uses chemical reactions to produce electrical energy?

    <p>Galvanic cell</p> Signup and view all the answers

    In electrochemistry, which type of cell converts chemical energy into electrical energy?

    <p>Voltaic cell</p> Signup and view all the answers

    What happens when an external potential equal to 1.1 V is applied in a galvanic cell?

    <p>The redox reaction stops and no current flows through the cell</p> Signup and view all the answers

    What is the function of an electrolytic cell in electrochemistry?

    <p>Carries out non-spontaneous chemical reactions using electrical energy</p> Signup and view all the answers

    Which type of cell is used for producing metals, sodium hydroxide, and chlorine by electrochemical methods?

    <p>Electrolytic cell</p> Signup and view all the answers

    What is the electrical potential of a Daniell cell when the concentration of Zn2+ and Cu2+ ions is unity (1 mol dm–3)?

    <p>+1.1 V</p> Signup and view all the answers

    What happens when an external potential greater than 1.1 V is applied in a galvanic cell?

    <p>The reaction reverses and starts in the opposite direction</p> Signup and view all the answers

    Which process do batteries and fuel cells perform?

    <p>Convert chemical energy into electrical energy</p> Signup and view all the answers

    What is the purpose of a salt bridge in an electrochemical cell?

    <p>To maintain electrical neutrality in the half-cells</p> Signup and view all the answers

    What is the significance of studying electrochemistry for creating new technologies?

    <p>To create technologies that are energy efficient and less polluting</p> Signup and view all the answers

    What is the role of electrochemistry in the transmission of sensory signals through cells to brain and vice versa?

    <p>It is involved in generating electrical signals for communication between cells</p> Signup and view all the answers

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