Author Question: Consider an electrochemical cell with a zinc electrode immersed in 1.0 M Zn2+ and a nickel electrode ... (Read 250 times)

charchew · **on:** Mar 21, 2021

Question 1

Consider an electrochemical cell with a zinc electrode immersed in 1.0 M Zn²⁺ and a silver electrode immersed in 1.0 M Ag⁺.

Zn²⁺ + 2e^–→ Zn E° = –0.758 V

Ag⁺ + e^–→ Ag E° = 0.800 V

Calculate E° for this cell.

◦ 0.042 V
◦ –0.042 V
◦ 1.558 V
◦ –1.558 V
◦ None of these are correct.

Question 2

Consider an electrochemical cell with a zinc electrode immersed in 1.0 M Zn²⁺ and a nickel electrode immersed in 0.10 M Ni²⁺.

Zn²⁺ + 2e^-→ Zn	E° = –0.76 V
Ni²⁺ + 2e^-→ Ni	E° = –0.23 V

Calculate the concentration of Ni²⁺if the cell is allowed to run to equilibrium at 25°C.

Reference: Ref 18-4

◦ 1.10 M
◦ 0.20 M
◦ 0.10 M
◦ 0 M
◦ None of these are correct.

mammy1697 · **Reply #1 on:** Mar 21, 2021

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