Using the E° values of A and B, predict which one is better for coating the surface of iron [E°_(Fe²⁺/Fe) = – 0.44V] to prevent corrosion? [Given: E°_(A²⁺|A) = -1.37 V and E°_(B²⁺|B) = – 0.24 V]

Only A can be used for coating the surface

A’ will prevent iron from rusting. So, we can coat the iron surface with metal A because it has more negative value.