9.9: Cell Potential and Free Energy

Multiple Choice

Which of the following is the net ionic equation for the overall reaction that would occur in a galvanic cell as it operates operates?

• Ag(s) + Zn²⁺(aq) → Ag²⁺(aq) + Zn(s)

• Ag⁺(aq) + Zn²⁺(aq) + 3e⁻ → AgZn(s)

• Ag⁺(aq) + Zn(s) → Ag(s) + Zn²⁺(aq) + e⁻

• 2Ag⁺(aq) + Zn(s) → 2Ag(s) + Zn²⁺(aq)

Multiple Choice

Will this reaction be thermodynamically favorable?

Fe²⁺(aq) + Co(s) ⟶ Fe(s) + Co²⁺ (aq)

GIVEN:

Co²⁺_(aq) / Co_(s) E^o = -0.28 V

Fe²⁺_(aq) / Fe_(s) E^o= -0.44 V

• The reaction is thermodynamically favorable because the value of E^o_cell is +0.16

• The reaction is thermodynamically favorable because the value of E^o_cell is +0.72

• The reaction is not thermodynamically favorable because the value of E^o_cell is -0.72

• The reaction is not thermodynamically favorable because the value of E^o_cell is -0.16

Multiple Choice

What is reduction?

• It is the gain of electrons.

• It is the loss of electrons.

• It is the creation of electrons.

• It is the destruction of electrons.

Multiple Choice

What occurs to the mass of copper electrode in the following reaction?
Zn/Zn+2 // Cu+2/Cu

• increases
• decreases
• remains the same

Multiple Choice

The electrode at which reduction occurs

• cathode
• anode
• salt bridge
• electrode