Electrochemical Cell Components Quiz
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Questions and Answers

What does a platinum electrode provide in a cell?

  • An insulating barrier
  • An environment for chemical reactions
  • A source of electrical resistance
  • A conducting surface for electron transfer (correct)

    • In the context of cell diagrams, what does a comma typically signify?

  • Separation between oxidized and reduced species (correct)
  • Transition between different cell components
  • Presence of an insulating layer
  • Boundary between different physical states

    • Why is a platinum electrode used if a system does not include a metal that can act as an electrode?

  • Because platinum provides resistance to electron transfer
  • Because platinum promotes chemical reactions
  • Because platinum enhances insulation in the cell
  • Because platinum is unreactive and can conduct electricity (correct)

    • What should be used to represent different physical states in a half equation within a cell diagram?

    <p>Solid vertical line</p> Signup and view all the answers

    What does the double line in a cell diagram represent?

    <p>Salt bridge between two half cells</p> Signup and view all the answers

    Why is it not possible to measure the absolute potential of a half electrode on its own?

    <p>Because it lacks the reference point provided by another electrode</p> Signup and view all the answers

    What role does the salt bridge play in an electrochemical cell?

    <p>Facilitates electron flow between the two half-cells</p> Signup and view all the answers

    Why does a voltage form in an electrochemical cell with zinc and copper half-cells?

    <p>More electrons accumulate on the copper electrode than on zinc electrode</p> Signup and view all the answers

    What is the function of a high resistance voltmeter in an electrochemical cell?

    <p>To measure the maximum possible potential difference</p> Signup and view all the answers

    Which electrode in an electrochemical cell is typically considered as the negative terminal?

    <p>Zinc electrode</p> Signup and view all the answers

    Why are simple half cells composed of a metal and a solution of a compound containing that metal?

    <p>To form a circuit that generates voltage</p> Signup and view all the answers

    What is the purpose of having distinct half-cells in an electrochemical setup?

    <p>To enable controlled oxidation and reduction reactions</p> Signup and view all the answers

    Why is a wire not used in a salt bridge for an electrochemical cell?

    <p>The wire can set up its own electrode system with the solutions.</p> Signup and view all the answers

    What happens if the voltmeter is removed and replaced with a bulb in an electrochemical cell circuit?

    <p>The bulb will light up due to the flow of current.</p> Signup and view all the answers

    In an electrochemical cell, what happens as the reactants are used up?

    <p>The voltage falls to zero.</p> Signup and view all the answers

    What does a cell diagram for an electrochemical cell represent?

    <p>The components and their phase boundaries in the cell.</p> Signup and view all the answers

    Which electrode in an electrochemical cell always undergoes reduction?

    <p>The most positive electrode.</p> Signup and view all the answers

    Why is potassium chloride not suitable for copper systems in a salt bridge?

    <p>Chloride ions can form complexes with copper ions.</p> Signup and view all the answers

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