Which of the following is true?

• Oxidation occurs at the cathode and oxidation occurs at the anode.
• Reduction occurs at the cathode and oxidation occurs at the anode.
• Oxidation occurs at the cathode and reduction occurs at the anode.
• Reduction occurs at the cathode and oxidation occurs at the cathode.

Reduction occurs at the cathode and oxidation occurs at the anode.

A metal anode has a standard reduction potential of minus 1.56 V and the cathode has a reduction potential of minus 1.16 V. What is the E⁰ _cell?

• -0.40 V
• +2.72 V
• +0.40 V
• -2.72 V

+0.40 V

Ex.

E⁰ _cell = E⁰ _reduction (cathode) - E⁰ _oxidation (anode)

E⁰ _cell = (-1.16 V) - (-1.56 V)

E⁰ _cell = +0.40 V

What solution is used as the salt bridge in all of these experiments?

• C u(NO₃)₂
• Zn(NO₃)₂
• A l(NO₃)₃
• Pb(NO₃)₂
• KNO₃

KNO₃

Use Equation 5 and the Standard Reduction Potentials table to determine which statement is true. Remember that any spontaneously operating cell has a positive E⁰ _cell value.

• Aluminum is the cathode and copper is the anode.
• Copper is the cathode and zinc is the anode.
• Zinc is the cathode and copper is the anode.
• Zinc is the cathode and lead is the anode.
• Aluminum is the cathode and zinc is the anode.
• Copper is the anode and aluminum is the cathode.
• Aluminum is the cathode and lead is the anode.
• Copper is the anode and lead is the cathode.

Copper is the cathode and zinc is the anode.