Galvanic Cell Reactions and Potentials

The video tutorial explains how to calculate the standard cell potential of a galvanic cell using two half-reactions. It covers the formula for standard cell potential, identifying oxidizing and reducing agents, rearranging reactions for electron balance, and calculating the standard cell potential. The tutorial emphasizes the importance of understanding the roles of the cathode and anode in these processes.

What is the standard reduction potential of the Fe2+/Fe half-reaction?

• 0.23 V

• 0.44 V

• -0.23 V

• -0.44 V

Which formula is used to calculate the standard cell potential?

• E°cell = E°cathode - E°anode

• E°cell = E°anode - E°cathode

• E°cell = E°cathode * E°anode

• E°cell = E°cathode + E°anode

In a galvanic cell, where does reduction occur?

• Neither

• Anode

• Cathode

• Both anode and cathode

What determines the stronger oxidizing agent in a galvanic cell?

• Higher standard reduction potential

• Lower oxidation potential

• Higher oxidation potential

• Lower standard reduction potential

Which half-reaction is rearranged to show oxidation in the example?

• Fe2+ + 2e- → Fe

• Ni → Ni2+ + 2e-

• Fe → Fe2+ + 2e-

• Ni2+ + 2e- → Ni

What is the standard reduction potential of the Ni2+/Ni half-reaction?

• -0.23 V

• 0.23 V

• 0.44 V

• -0.44 V

What is the overall reaction for the given galvanic cell?

• Fe + Ni → Fe2+ + Ni2+

• Fe2+ + Ni2+ → Fe + Ni

• Fe2+ + Ni → Fe + Ni2+

• Fe + Ni2+ → Fe2+ + Ni

How is the standard cell potential calculated from the rearranged reactions?

• By adding the potentials of both reactions

• By dividing the cathode potential by the anode potential

• By subtracting the anode potential from the cathode potential

• By multiplying the potentials of both reactions

What is the final standard cell potential for the given galvanic cell?

• 0.21 V

• 0.67 V

• 0.44 V

• 0.23 V

Why must the standard cell potential always be positive?

• To ensure the reaction is spontaneous

• To ensure the reaction is non-spontaneous

• To balance the equation

• To match the oxidation potential