Electrochemistry: Cell Reactions and Commercial Applications
18 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the electrode potential for the disproportionation reaction involving Cu​2+​ ions?

  • +0.52V
  • +0.15V
  • +0.37V (correct)
  • +0.34V

    • Which type of electrochemical cell is commonly used as a source of energy for commercial use?

  • Fuel cells (correct)
  • Rechargeable cells
  • Non-rechargeable cells
  • Hydrogen fuel cells

    • What is the main waste product produced in a hydrogen fuel cell?

  • Oxygen
  • Methane
  • Carbon dioxide
  • Water (correct)

    • Why are fuel cells considered advantageous for generating electrical current?

    <p>They generate electricity without needing to be recharged</p> Signup and view all the answers

    What is one of the downsides of hydrogen fuel cells?

    <p>High flammability of hydrogen</p> Signup and view all the answers

    Based on the provided electrode potentials, is the disproportionation reaction thermodynamically feasible?

    <p>Yes, it is thermodynamically feasible</p> Signup and view all the answers

    What aspect of a reaction does the cell emf value indicate?

    <p>Thermodynamic feasibility</p> Signup and view all the answers

    Why might a reaction not actually occur even if it is thermodynamically feasible?

    <p>Slow rate of reaction</p> Signup and view all the answers

    What series can standard electrode potentials be ordered into?

    <p>Electrochemical series</p> Signup and view all the answers

    Which type of electrode potentials are better oxidising agents?

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

    In a disproportionation reaction, what happens to the oxidation number of a species?

    <p>It both increases and decreases</p> Signup and view all the answers

    How can electrode potentials help determine if a species will undergo disproportionation?

    <p>By checking if the overall E​ө​cell​ value is positive</p> Signup and view all the answers

    How does increasing the concentration of the solutions in an electrochemical cell affect the cell emf?

    <p>It makes the cell emf more positive.</p> Signup and view all the answers

    Which of the following is the most correct statement about the relationship between cell emf and entropy change?

    <p>Cell emf is directly proportional to the total entropy change of the reaction.</p> Signup and view all the answers

    Which of the following electrochemical cells could be used to study disproportionation reactions?

    <p>A cell with the same element in different oxidation states.</p> Signup and view all the answers

    What is the effect of increasing the pressure on the cell emf?

    <p>It makes the cell emf more negative.</p> Signup and view all the answers

    What is a major limitation in using the standard hydrogen electrode (SHE) to determine the feasibility of a reaction?

    <p>The SHE cannot be used to accurately measure the standard cell potential of the reaction.</p> Signup and view all the answers

    Which type of electrochemical cell is most commonly used in commercial applications?

    <p>Fuel cells that use a metal and a gas electrode.</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser