Electrons are transferred through the external circuit from the

anode to the cathode in both electrolytic and galvanic cells

cathode to the anode in both electrolytic and galvanic cells

anode to the cathode in electrolytic cells and from the cathode to the anode in galvanic cells

cathode to the anode in electrolytic cells and from the anode to the cathode in galvanic cells

Cd 2+ ( aq ) + 2e - --> Cd( s ) E° = -0.402 V Tl + ( aq ) + e - --> Tl( s ) E° = -0.336 V Co 2+ ( aq ) + 2 e - --> Co( s ) E° = -0.282 V Cu 2+ ( aq ) + 2 e - --> Cu( s ) E° = +0.337 V Which reaction will give a galvanic cell with the highest E°?

Cu 2+ ( aq ) + Cd( s ) --> Cd 2+ ( aq ) + Cu( s )

2 Tl( s ) + Cu 2+ ( aq ) --> 2 Tl + ( aq ) + Cu( s )

2 Tl( s ) + Cd 2+ ( aq ) --> 2 Tl + ( aq ) + Cd( s )

Cd 2+ ( aq ) + Cu( s ) --> Cu 2+ ( aq ) + Cd( s )

Cu( s ) + 2 Ag + ( aq ) --> Cu 2+ ( aq ) + 2 Ag( s ) E° = +0.460 V The E° value of the cell based on the reaction above is +0.460 V under standard conditions. An increase in which of the following would produce a higher voltage?

concentration of the Ag + ( aq ) solution

volume of the Cu 2+ ( aq ) solution

Cu( s ) + 2 Ag + ( aq ) --> Cu 2+ ( aq ) + 2 Ag( s ) E° = +0.460 V Which process occcrs in the cathode compartment of this cell?

Ag + ( aq ) ions move toward the electrode

Ag + ( aq ) ions move away from the electrode

Cu 2+ ( aq ) ions move toward the electrode

Cu 2+ ( aq ) ions move away from the electrode

Which of the following statements concerning galvanic cells is/are true?

The two half-cells are connected by a salt bridge.

Electrons flow from the anode to the cathode.

Reduction occurs at the cathode.

Oxidation and Reduction Chapter 20

Authored by Charles Martinez

Chemistry

11th - 12th Grade

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MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Refer to the structures of the four ions shown, which are dichromate (Cr₂O₇^2-), permanganate (MnO₄^-), thiosulfate (S₂O₃^2-), and triiodide (I₃^-) ions.
Which structure best represents the permanganate ion?

Tags

NGSS.HS-PS1-3

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Refer to the structures of the four ions shown, which are dichromate (Cr₂O₇^2-), permanganate (MnO₄^-), thiosulfate (S₂O₃^2-), and triiodide (I₃^-) ions.
Which structure best represents the dichromate ion?

Tags

NGSS.HS-PS1-3

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Answer the following questions using the unbalanced half-reaction:
Cr₂O₇^2- + H⁺ --> Cr³⁺ + H₂O
What is the oxidation number of Cr in Cr₂O₇^2-?

-2

Tags

NGSS.HS-PS1-2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Answer the following questions using the unbalanced half-reaction:
Cr₂O₇^2- + H⁺ --> Cr³⁺ + H₂O
How many H⁺ions are in the balanced half reaction?

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Answer the following questions using the unbalanced half-reaction:
Cr₂O₇^2- + H⁺ --> Cr³⁺ + H₂O
How many electrons are needed (and on which side of the half-reaction) to balance the electron transfer?

4 on the right

8 on the right

3 on the left

6 on the left

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Which equation represents an oxidation-reduction reaction?

2 HCl(aq) + Na₂CO₃(s) --> 2 NaCl(aq) + CO₂(g) + H₂O(l)

2 HCl(aq) + Zn(s) --> H₂(g) + ZnCl₂(aq)

HCl(aq) + AgNO₃(aq) --> AgCl(s) + HNO₃(aq)

HCl(aq) + NH₃(g) --> NH₄Cl(s)

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which is the net ionic equation for the nitric acid oxidation of iron(II) chloride to form iron(III) chloride and nitrogen(II) oxide?

3 FeCl₂ + 4 HNO₃ --> 2 FeCl₃ + Fe(NO₃)₃ + N + 2 H₂O

3 Fe²⁺ + 6 Cl + 4 NO₃^- + 4 H⁺ --> 3 Fe³⁺ + 6Cl + 3NO₃^- + NO + 2 H₂O

3 Fe²⁺ + NO₃^-+ 4 H⁺--> 3 Fe³⁺ + NO + 2 H₂O

3 Fe²⁺ + NO₃^-+ 6 H⁺--> 3 Fe³⁺ + N²⁺ + 3 H₂O

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-7

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Oxidation and Reduction Chapter 20

Refer to the structures of the four ions shown, which are dichromate (Cr₂O₇^2-), permanganate (MnO₄^-), thiosulfate (S₂O₃^2-), and triiodide (I₃^-) ions.
Which structure best represents the permanganate ion?

Refer to the structures of the four ions shown, which are dichromate (Cr₂O₇^2-), permanganate (MnO₄^-), thiosulfate (S₂O₃^2-), and triiodide (I₃^-) ions.
Which structure best represents the dichromate ion?

Answer the following questions using the unbalanced half-reaction:
Cr₂O₇^2- + H⁺ --> Cr³⁺ + H₂O
What is the oxidation number of Cr in Cr₂O₇^2-?

Answer the following questions using the unbalanced half-reaction:
Cr₂O₇^2- + H⁺ --> Cr³⁺ + H₂O
How many H⁺ions are in the balanced half reaction?

Answer the following questions using the unbalanced half-reaction:
Cr₂O₇^2- + H⁺ --> Cr³⁺ + H₂O
How many electrons are needed (and on which side of the half-reaction) to balance the electron transfer?

Which equation represents an oxidation-reduction reaction?

Which is the net ionic equation for the nitric acid oxidation of iron(II) chloride to form iron(III) chloride and nitrogen(II) oxide?

Of the substances listed, in which one can the nitrogen atom not be oxidized further?

2 MnO₄^- + 5 H₂O₂ + 6H⁺ --> 2 Mn²⁺ + 5 O₂ + 8 H₂O
What volume of 0.0100 M KMnO₄ solution is needed to react with 10.0 mL of 0.200 M H₂O₂?

Sn²⁺ + MnO₄^- + H⁺ --> Sn⁴⁺ + Mn²⁺ + H₂O
What is the Sn²⁺/MnO₄^- ratio when the oxidation-reduction reaction above is correctly balanced?

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Oxidation and Reduction Chapter 20

Refer to the structures of the four ions shown, which are dichromate (Cr2O72-), permanganate (MnO4-), thiosulfate (S2O32-), and triiodide (I3-) ions.Which structure best represents the permanganate ion?

Refer to the structures of the four ions shown, which are dichromate (Cr2O72-), permanganate (MnO4-), thiosulfate (S2O32-), and triiodide (I3-) ions.Which structure best represents the dichromate ion?

Answer the following questions using the unbalanced half-reaction:Cr2O72- + H+ --> Cr3+ + H2OWhat is the oxidation number of Cr in Cr2O72-?

Answer the following questions using the unbalanced half-reaction:Cr2O72- + H+ --> Cr3+ + H2OHow many H+ ions are in the balanced half reaction?

Answer the following questions using the unbalanced half-reaction:Cr2O72- + H+ --> Cr3+ + H2OHow many electrons are needed (and on which side of the half-reaction) to balance the electron transfer?

Which equation represents an oxidation-reduction reaction?

Which is the net ionic equation for the nitric acid oxidation of iron(II) chloride to form iron(III) chloride and nitrogen(II) oxide?

Of the substances listed, in which one can the nitrogen atom not be oxidized further?

2 MnO4- + 5 H2O2 + 6H+ --> 2 Mn2+ + 5 O2 + 8 H2OWhat volume of 0.0100 M KMnO4 solution is needed to react with 10.0 mL of 0.200 M H2O2?

Sn2+ + MnO4- + H+ --> Sn4+ + Mn2+ + H2OWhat is the Sn2+/MnO4- ratio when the oxidation-reduction reaction above is correctly balanced?

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Refer to the structures of the four ions shown, which are dichromate (Cr₂O₇^2-), permanganate (MnO₄^-), thiosulfate (S₂O₃^2-), and triiodide (I₃^-) ions.
Which structure best represents the permanganate ion?

Refer to the structures of the four ions shown, which are dichromate (Cr₂O₇^2-), permanganate (MnO₄^-), thiosulfate (S₂O₃^2-), and triiodide (I₃^-) ions.
Which structure best represents the dichromate ion?

Answer the following questions using the unbalanced half-reaction:
Cr₂O₇^2- + H⁺ --> Cr³⁺ + H₂O
What is the oxidation number of Cr in Cr₂O₇^2-?

Answer the following questions using the unbalanced half-reaction:
Cr₂O₇^2- + H⁺ --> Cr³⁺ + H₂O
How many H⁺ions are in the balanced half reaction?

Answer the following questions using the unbalanced half-reaction:
Cr₂O₇^2- + H⁺ --> Cr³⁺ + H₂O
How many electrons are needed (and on which side of the half-reaction) to balance the electron transfer?

2 MnO₄^- + 5 H₂O₂ + 6H⁺ --> 2 Mn²⁺ + 5 O₂ + 8 H₂O
What volume of 0.0100 M KMnO₄ solution is needed to react with 10.0 mL of 0.200 M H₂O₂?

Sn²⁺ + MnO₄^- + H⁺ --> Sn⁴⁺ + Mn²⁺ + H₂O
What is the Sn²⁺/MnO₄^- ratio when the oxidation-reduction reaction above is correctly balanced?