Answer Happy

On the basis of the standard emf series, which material
combination would provide the highest overall cell potential?
Co and Fe
Pb and Ni
Sn and Cr
Cu and Fe
Question 19 Increasingly inert (cathodic) Increasingly active (anodic) Electrode Reaction Au³+ + 3e- → Au O₂ + 4H+ + 4e² Pt²+ + 2e Ag+ e O₂ + 2H₂O + 4e¯ → Cu²+ + 2e → Cu 2H+ + 2e™ → H₂ Pb²+ + 2e Pb Sn²+ + 2e Sn Ni²+ + 2e Co²+ + 2e Cd²+ + 2e Fe2+ + 2e Cr³+ + 3e →→Cr Zn²+ + 2e → Zn Al³+ + 3e →→ Al Mg2+ + 2e →→→ Mg Na + e Na K+ + e→→→→→→→K → → 2H₂O Pt Ag 4(OH¯) Standard Electrode Potential, V° (V) +1.420 +1.229 +0.800 +0.401 +0.340 0.000 -0.126 -0.136 -0.250 -0.277 -0.403 -0.440 -0.744 -0.763 -1.662 -2.363 -2.714 -2.924 ~ +1.2