Calculating Cell Potential

What reaction occurs at the anode?

• Ag⁺ + e^- →Ag

• Ag → Ag⁺ + e^-

• Ni²⁺ + 2e^- → Ni

• Ni → Ni²⁺ + 2e^-

Which is the correct line notation for the cell?

• Ag⁺ I Ag II Ni I Ni²⁺

• Ag I Ag⁺ II Ni I Ni²⁺

• Ni I Ni²⁺ II Ag⁺ I Ag

• Ni²⁺ I Ni II Ag⁺ I Ag

• 1.05V

• -1.05V

• 0.55V

• -0.55V

• –1.51
• - 0.03
• +0.03
• +1.51

What is the balanced equation and cell potential for the spontaneous redox reaction that occurs in the voltaic cell: Al I Al³⁺ II Ni²⁺ I Ni

Given:

Al³⁺ + 3e^- --> Al E^o = -1.66V

Ni²⁺ + 2e^- --> Ni. E^o = -0.23 V

• 2Al³⁺ + 3Ni → 2Al + 3Ni²⁺ E^O = 1.89 V
• 2Al + 3Ni²⁺ → 2Al³⁺ + 3Ni E^O = 1.89 V
• 2Al³⁺ + 3Ni → 2Al + 3Ni²⁺ E^O = 1.43 V
• 2Al + 3Ni²⁺ → 2Al³⁺ + 3Ni E^O = 1.43 V