Question
Chemistry Question on Electrochemistry
The standard reduction potentials at 298K for the following half cells are given below. Find the strongest reducing agent. Zn2+ (aq.) + 2e ↔Zn (s), Ev = - 0.76 V; Cr3+ 3 e ↔Cr(s), Ev = -0.74 V2H+ + 2e ↔ H2 (g), Ev = 0.0 V; Fe3+ + e ↔ Fe2+ (aq.), Ev = 0.77 V
A
Fe2+(aq)
B
Zn(s)
C
Cr(s)
D
H2(g)
Answer
Zn(s)
Explanation
Solution
The correct option is (B): Zn(s)