Answer to Question #184028 in General Chemistry for Aich80

Question

A cell using Zn/Zn⁺⁴ (aq, 1M) and H₂ / H⁺¹ (aq, 1M) generates a cell potential of + 0.67 V under standard conditions.

A. Write the half-cell reaction at the anode.

B. Write the half-cell reaction at the cathode.

C. Write the electrochemical cell notation.

D. Calculate the standard reduction potential at the anode.

Answer 1

A. Zn - 2e = Zn²⁺

B. 2H⁺ + 2e = H₂

C. Zn | Zn²⁺ || H⁺ | H₂, Pt

D. E_cell = E_H - E_Zn

E_H (cathode) = 0V

E_Zn (anode) = E_H - E_cell = 0 - 0.67V = -0.67V