Answer
Standard electrode potentials of each are given:
Ag = +0.799
Cu = +0.337
Ni = -0.28
Cr = -0.74
Combination with largest positive cell potential:
$3Ag^{+} + Cr → 3Ag + Cr^{3+}$
Total reduction potential = 0.799 + 0.74 = +1.54
Work Step by Step
Given above
