A Voltaic Cell Is Made by Placing a Zinc Electrode

Multiple Choice

A voltaic cell is made by placing a zinc electrode in a compartment in which the Zn²⁺ concentration is 2.0 × 10^-5 M and by placing a Pt electrode in the other compartment,in which the H⁺ concentration is 3.4 M and P_H2 = 1.00 atm.The Zn²⁺/Zn half-cell reduction potential is -0.76 V,and the H⁺/H₂ half-cell reduction potential is 0.00 V.What is the equilibrium constant at 25°C for the spontaneous cell reaction?

A) 4 × 10⁴
B) 5 × 10²⁰
C) 5 × 10²²
D) 7 × 10 ¹²
E) 5 × 10 ²⁵