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Topic 11: Redox and electrochemistry
20. Voltaic cell: Interpreting voltaic cell diagram
Answer questions 1 – 10 based on the electrochemical cell diagram below.
Teacher Preview Copy
1. The anode in this electrochemical cell is 3+ 2+
1) Al atoms 2) Ni atoms 3) Al ions 4) Ni ions
2. Which serves as the cathode in this chemical cell?
3+
2+
1) Al 2) Ni 3) Al 4) Ni
3. When the switch is closed, which species will be oxidized in this electrochemical cell?
1) Al ions 2) Al atoms 3) Ni ions 4) Ni atoms
3+
2+
4. Which particles in this electrochemical cell undergo reduction? 4) Ni
2+
3+
3) Ni
2) Al
1) Al
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5. The loss of electrons occurs at 3) Nickel electrode, because it is the anode
1) Aluminum electrode, because it is the anode
2) Aluminum electrode, because it is the cathode 4) Nickel electrode, because it is the cathode
6. Which is true of the electrochemical cell when the switch is closed?
2+
1) Electrons will flow from Ni to Ni 3) Electrons will flow from Ni to Al
3+
2) Electrons will flow from Al to Al 4) Electrons will flow from Al to Ni
7. The salt bridge in the electrochemical cell connects
2+
1) Al atom to Ni atom 3) Ni atom to Ni ion
2+
3+
2+
4) Ni ion to Al atom
2) Al ions to Ni ions
8. Which equation correctly shows the oxidation that occurs in this cell?
-
2+
-
3+
1) Al + 3e --------- Al - 3) Ni + 2e ------ Ni -
3+
2+
4) Ni ------------------ Ni + 2e
2) Al ---------------- Al + 3e
9. When the switch is closed, which correctly shows the reduction process that takes place?
2+
-
-
3+
1) Al + 3e ------ Al - 3) Ni + 2e ----- Ni -
3+
2+
2) Al ----------------- Al + 3e
4) Ni ------------------ Ni + 2e
10. Which is true of this cell as the redox reaction is taking place?
1) The mass of Al electrode will increase, and the mass of Ni electrode will decrease
2) The mass of Al electrode will decrease, and the mass of Ni electrode will increase
3) The mass of Al electrode will increase, and the mass of Ni electrode will remain the same
4) The mass of Al electrode will remain the same, and the mass of Ni electrode will increase
332 Copyright © 2010 E3 Scholastic Publishing. All Rights Reserved. Survivingchem.com
Topic 11: Redox and electrochemistry
20. Voltaic cell: Interpreting voltaic cell diagram
Answer questions 1 – 10 based on the electrochemical cell diagram below.
Teacher Preview Copy
1. The anode in this electrochemical cell is 3+ 2+
1) Al atoms 2) Ni atoms 3) Al ions 4) Ni ions
2. Which serves as the cathode in this chemical cell?
3+
2+
1) Al 2) Ni 3) Al 4) Ni
3. When the switch is closed, which species will be oxidized in this electrochemical cell?
1) Al ions 2) Al atoms 3) Ni ions 4) Ni atoms
3+
2+
4. Which particles in this electrochemical cell undergo reduction? 4) Ni
2+
3+
3) Ni
2) Al
1) Al
Teacher Preview Copy
5. The loss of electrons occurs at 3) Nickel electrode, because it is the anode
1) Aluminum electrode, because it is the anode
2) Aluminum electrode, because it is the cathode 4) Nickel electrode, because it is the cathode
6. Which is true of the electrochemical cell when the switch is closed?
2+
1) Electrons will flow from Ni to Ni 3) Electrons will flow from Ni to Al
3+
2) Electrons will flow from Al to Al 4) Electrons will flow from Al to Ni
7. The salt bridge in the electrochemical cell connects
2+
1) Al atom to Ni atom 3) Ni atom to Ni ion
2+
3+
2+
4) Ni ion to Al atom
2) Al ions to Ni ions
8. Which equation correctly shows the oxidation that occurs in this cell?
-
2+
-
3+
1) Al + 3e --------- Al - 3) Ni + 2e ------ Ni -
3+
2+
4) Ni ------------------ Ni + 2e
2) Al ---------------- Al + 3e
9. When the switch is closed, which correctly shows the reduction process that takes place?
2+
-
-
3+
1) Al + 3e ------ Al - 3) Ni + 2e ----- Ni -
3+
2+
2) Al ----------------- Al + 3e
4) Ni ------------------ Ni + 2e
10. Which is true of this cell as the redox reaction is taking place?
1) The mass of Al electrode will increase, and the mass of Ni electrode will decrease
2) The mass of Al electrode will decrease, and the mass of Ni electrode will increase
3) The mass of Al electrode will increase, and the mass of Ni electrode will remain the same
4) The mass of Al electrode will remain the same, and the mass of Ni electrode will increase
332 Copyright © 2010 E3 Scholastic Publishing. All Rights Reserved. Survivingchem.com
