Which half reaction is most easily reduced?
a.Ag⁺ + e⁻ → Ag = 0.80 V
b.Br₂ + 2e⁻ → 2Br− = 1.07 V
c.Fe³⁺ + e⁻ → Fe²⁺ = 0.77 V
d.Zn²⁺ + 2e⁻→ Zn = –0.76 V