Unit B2 Lab: Building a Voltaic Cell
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Questions and Answers

What is the recommended method for completing the assessment for Unit B2 Lab?

  • Fill it out online without any hand-written work.
  • Print the assessment and write answers by hand. (correct)
  • Complete it digitally using a stylus only.
  • Use a scanning app and upload directly to D2L.

    • Which of the following is NOT one of the options for submitting the assessment?

  • Using a scanning app to create a PDF file.
  • Uploading it to the assigned folder on D2L.
  • Submitting work in a digital format without photos. (correct)
  • Using a scanner to scan work.

    • Which statement is accurate regarding the balancing of chemical equations in the assessment?

  • Balancing is optional for all equations.
  • Materials do not require states of matter notation.
  • Equations must include states of matter. (correct)
  • Only half of the equations need balancing.

    • What should be done if using a digital method for the assessment is chosen?

    <p>Opt to use a stylus and tablet for clarity. (D)</p> Signup and view all the answers

    When uploading the assignment, how should the pages be organized?

    <p>All pages must be in order, upright, and readable. (D)</p> Signup and view all the answers

    In which cell does oxidation occur at the anode?

    <p>Cell 1 (C)</p> Signup and view all the answers

    What is true about the reduction half-reaction in Cell 2?

    <p>Fe2+(aq) is reduced to Fe(s) (A)</p> Signup and view all the answers

    Which cell has Mg(s) as the anode?

    <p>Cell 5 (D)</p> Signup and view all the answers

    In Cell 6, what is the standard cell potential likely to be?

    <p>Significantly positive (B)</p> Signup and view all the answers

    In which cell does the reduction half-reaction involve Cu2+(aq)?

    <p>Cell 3 (B)</p> Signup and view all the answers

    Which half-reaction corresponds to the oxidation process in Cell 4?

    <p>Zn(s) to Zn2+(aq) (D)</p> Signup and view all the answers

    Which cell has both metals in the same oxidation state?

    <p>Cell 6 (D)</p> Signup and view all the answers

    What is true about the net cell reaction in Cell 5?

    <p>Involves both oxidation and reduction processes (B)</p> Signup and view all the answers

    Flashcards

    Voltaic Cell Lab

    A laboratory activity focusing on oxidation-reduction principles in electrochemical cells.

    Oxidation-Reduction

    Chemical reactions involving electron transfer.

    Electrochemical Cell

    A device that converts chemical energy into electrical energy.

    Assessment Submission

    Process of turning in the completed assignment.

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    PDF File Format

    A file format best suited for submitting documents like assignments electronically.

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    Anode

    The electrode where oxidation occurs, losing electrons and releasing them into the circuit.

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    Cathode

    The electrode where reduction occurs, gaining electrons from the circuit.

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    Oxidation Half-Reaction

    A half-reaction where electrons are lost, increasing the oxidation state of the species.

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    Reduction Half-Reaction

    A half-reaction where electrons are gained, decreasing the oxidation state of the species.

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    Net Cell Reaction

    The overall chemical reaction occurring in the electrochemical cell, combining oxidation and reduction half-reactions.

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    Standard Cell Potential (E°)

    The potential difference between the two half-cells under standard conditions (25°C, 1 atm, 1 M concentration).

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    Observed Cell Potential (E)

    The actual potential difference measured between the two half-cells under non-standard conditions.

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    Predict the Cell Potential

    Using standard reduction potentials to calculate the expected voltage difference between the two half-cells.

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    Study Notes

    Unit B2 Lab: Building a Voltaic Cell

    • This assignment applies oxidation-reduction principles to electrochemical cells.
    • Chemical formulas and equations should include states of matter.
    • Balancing chemical equations is required when needed.
    • Completing the assessment by hand is recommended.
      • Print the template and write answers.
      • Digital completion is possible but less recommended due to equation editor's time consumption.
    • Submit a single PDF file of the assignment pages, ensuring they are in order and readable.
      • Scan using apps like Adobe Scan or CamScanner.
      • Use a scanner.
      • Complete using a stylus and tablet.
    • Upload the file to the "Unit B2 Lab" assignment folder in D2L.

    Observations and Cells (Page 2)

    • Various electrochemical cell observations are provided for different cells.
    • Each cell includes anode, cathode, reduction half-reactions, oxidation half-reactions, net cell reactions, predicted standard cell potentials, and observed cell potentials.
      • Example cell configurations like Zn(s) | Zn2+(aq) || Cu2+(aq) | Cu(s) are listed.

    Drawing Voltaic Cell Diagrams (Page 3)

    • Students must draw diagrams of two cells from a virtual lab.
      • Include beakers, salt bridge, wires, voltmeter, anode, and cathode.
      • Label anode and cathode components.
      • Indicate the direction of electron flow.
      • Show the movement of cations and anions.
      • Diagrams cannot be copied from the internet.

    Comparisons and Considerations (Page 4)

    • Compare predicted and observed cell potentials, noting discrepancies.
    • Possible reasons for differences include solution concentration, temperature variations, and electrode limitations.
    • Small voltaic cells were used to reduce chemical handling.
    • Increased cell size won't impact equilibrium but may affect rate or output.
    • Ni-Cd cell potential calculation example: Anode potential = Cell potential − Cathode potential (Example: Anode = 1.30V - 0.49V = 0.81V).

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    Related Documents

    Unit B2 Lab: Building a Voltaic Cell PDF

    Description

    This lab assignment focuses on applying oxidation-reduction principles to construct and analyze electrochemical cells. It involves balancing chemical equations, completing assessments, and submitting a well-organized PDF of your work. You will also observe various electrochemical cells and their reactions.

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