CH 18: Galvanic cells
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Questions and Answers

What is the role of a salt bridge in a galvanic cell?

  • Helps in measuring the flow of electrons
  • Increases the rate of the redox reactions
  • Causes the anode to corrode
  • Prevents the solutions from mixing directly (correct)

    • In a zinc-copper galvanic cell, which metal acts as the anode?

  • Nickel
  • Copper
  • Iron
  • Zinc (correct)

    • What is the function of a salt bridge in completing a galvanic cell circuit?

  • Maintaining charge balance (correct)
  • Facilitating ion transfer
  • Increasing the cell voltage
  • Causing oxidation reactions

    • Which notation is used to represent a galvanic cell, separating phases and components?

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

    What is the basis for the electrical current generated by a galvanic cell?

    <p>Flow of electrons from anode to cathode (A)</p> Signup and view all the answers

    What does setting up a zinc-copper galvanic cell in a lab involve?

    <p>Measuring mass changes of electrodes due to oxidation and reduction (D)</p> Signup and view all the answers

    In galvanic cells, what process converts chemical energy into electrical energy directly?

    <p>Spontaneous redox reactions (C)</p> Signup and view all the answers

    Why is understanding galvanic cells essential?

    <p>To grasp principles of electrochemistry and practical applications (C)</p> Signup and view all the answers

    What property makes a salt bridge crucial in galvanic cells?

    <p>Maintaining charge balance (C)</p> Signup and view all the answers

    What does a salt bridge allow in a galvanic cell?

    <p>Ions to flow between half-cells (D)</p> Signup and view all the answers

    In a galvanic cell, what process occurs at the anode?

    <p>Oxidation (A)</p> Signup and view all the answers

    What is the primary function of a galvanic cell?

    <p>To convert chemical energy into electrical energy (C)</p> Signup and view all the answers

    Which component of a galvanic cell allows the transfer of ions?

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

    In a redox reaction, what is the role of the reducing agent?

    <p>It loses electrons (B)</p> Signup and view all the answers

    What is the purpose of the salt bridge in a galvanic cell?

    <p>To maintain electrical neutrality (B)</p> Signup and view all the answers

    What is the characteristic of an oxidation reaction?

    <p>Increase in oxidation number (A)</p> Signup and view all the answers

    Which electrode in a galvanic cell is marked positive?

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

    What is the role of the oxidizing agent in a redox reaction?

    <p>It gains electrons (C)</p> Signup and view all the answers

    In a galvanic cell, what is the process that occurs at the cathode?

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

    What is the significance of oxidation numbers in redox reactions?

    <p>They determine the direction of electron flow (A)</p> Signup and view all the answers

    Which of the following statements accurately describes the role of the anode in a galvanic cell?

    <p>It is the electrode where oxidation occurs and is marked negative. (B)</p> Signup and view all the answers

    In a redox reaction, what is the role of the oxidizing agent?

    <p>It is the substance that gains electrons and is reduced. (B)</p> Signup and view all the answers

    Which component of a galvanic cell contains ions of the metal electrode and allows the transfer of ions?

    <p>The electrolyte (A)</p> Signup and view all the answers

    In a redox reaction, an increase in oxidation number is associated with which process?

    <p>Oxidation (A)</p> Signup and view all the answers

    What is the primary function of a galvanic cell?

    <p>To convert chemical energy into electrical energy (C)</p> Signup and view all the answers

    Which of the following statements accurately describes the role of the reducing agent in a redox reaction?

    <p>It is the substance that donates electrons. (C)</p> Signup and view all the answers

    What is the primary function of the salt bridge in a galvanic cell?

    <p>To maintain electrical neutrality in the cell (A)</p> Signup and view all the answers

    Which electrode in a galvanic cell is marked as positive?

    <p>The cathode (C)</p> Signup and view all the answers

    In a redox reaction, a decrease in oxidation number is associated with which process?

    <p>Reduction (A)</p> Signup and view all the answers

    Which of the following statements accurately describes the role of the electrolyte in a galvanic cell?

    <p>It is the medium that allows the transfer of ions in each half-cell. (A)</p> Signup and view all the answers

    What is the role of the salt bridge in a galvanic cell?

    <p>Preventing the solutions from mixing directly (C)</p> Signup and view all the answers

    What does the cell notation used for a galvanic cell represent?

    <p>The flow of electrons from anode to cathode (C)</p> Signup and view all the answers

    Why is measuring the mass of zinc and copper electrodes before and after the reaction important in a lab setup?

    <p>To observe changes due to oxidation and reduction (B)</p> Signup and view all the answers

    In a galvanic cell, what occurs at the cathode?

    <p>Ions gain electrons and form metal (A)</p> Signup and view all the answers

    What is the primary function of cell notation in representing a galvanic cell?

    <p>To separate different phases and components (B)</p> Signup and view all the answers

    Why is the movement of electrons from anode to cathode crucial in a galvanic cell?

    <p>To maintain charge balance (D)</p> Signup and view all the answers

    What characteristic distinguishes a reducing agent in a redox reaction?

    <p>Gains electrons and is oxidized (B)</p> Signup and view all the answers

    Which of the following is NOT a fundamental component of a galvanic cell?

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

    In a redox reaction, which of the following is the correct relationship between the oxidation number and the process?

    <p>Oxidation is characterized by an increase in oxidation number, while reduction sees a decrease in oxidation number. (A)</p> Signup and view all the answers

    Which of the following statements accurately describes the role of the reducing agent in a redox reaction?

    <p>The reducing agent loses electrons and is reduced. (A)</p> Signup and view all the answers

    In a galvanic cell, which electrode is marked as the positive terminal?

    <p>The cathode (B)</p> Signup and view all the answers

    What is the primary function of the salt bridge in a galvanic cell?

    <p>To allow the transfer of ions between the half-cells (D)</p> Signup and view all the answers

    In a zinc-copper galvanic cell, which metal acts as the anode?

    <p>Zinc (A)</p> Signup and view all the answers

    What is the basis for the electrical current generated by a galvanic cell?

    <p>The spontaneous redox reaction occurring in the cell (B)</p> Signup and view all the answers

    Which of the following statements accurately describes the role of the oxidizing agent in a redox reaction?

    <p>The oxidizing agent gains electrons and is reduced. (C)</p> Signup and view all the answers

    What is the primary function of the electrolyte in a galvanic cell?

    <p>To allow the transfer of ions between the half-cells (C)</p> Signup and view all the answers

    What is the significance of measuring the mass of zinc and copper electrodes before and after the reaction in a lab setup?

    <p>To verify the conservation of mass in the redox reaction (A)</p> Signup and view all the answers

    In a galvanic cell, which of the following processes occurs at the cathode?

    <p>The reduction of metal ions to form metal atoms (B)</p> Signup and view all the answers

    What is the primary function of the cell notation used to represent a galvanic cell?

    <p>To indicate the direction of electron flow (C)</p> Signup and view all the answers

    In the redox reactions occurring in a galvanic cell, what property distinguishes the reducing agent?

    <p>It donates electrons and decreases its oxidation number (D)</p> Signup and view all the answers

    What is the primary reason for measuring the mass of zinc and copper electrodes before and after the reaction in a laboratory setup?

    <p>To observe changes due to oxidation and reduction (B)</p> Signup and view all the answers

    In the context of galvanic cells, what is the primary function of the salt bridge?

    <p>To maintain electrical neutrality by allowing ion flow (B)</p> Signup and view all the answers

    In a redox reaction, a decrease in oxidation number is associated with which process?

    <p>Reduction (A)</p> Signup and view all the answers

    What is the primary reason for understanding galvanic cells?

    <p>To comprehend the principles of electrochemistry (C)</p> Signup and view all the answers

    In a galvanic cell, what is the characteristic of an oxidation reaction occurring at the anode?

    <p>The metal atoms lose electrons (C)</p> Signup and view all the answers

    What is the primary function of a galvanic cell in converting chemical energy to electrical energy?

    <p>Providing a pathway for the flow of electrons through an external circuit (B)</p> Signup and view all the answers

    In a zinc-copper galvanic cell, which metal acts as the cathode?

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

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