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Viewing:

Prelab for Voltaic Cell SD

front 1

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.

back 1

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

front 2

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

back 2

+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

front 3

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

back 3

KNO3

front 4

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.

back 4

Copper is the cathode and zinc is the anode.