By considering the standard reduction potentials given in Table 7.2, decide which of the following metals could be used as a sacrificial coating to protect nickel metal, Ni (s).

Question

Quizplus · Accepted Answer

The metal that can be used as a sacrificial coating to protect nickel metal should have a lower standard reduction potential than nickel (-0.25V). Among the given metals, magnesium has the lowest standard reduction potential (-2.37V) compared to nickel, making it the best choice for sacrificial coating. Copper (0.34V), silver (0.80V), and tin (-0.14V) all have higher or almost equal reduction potentials to nickel and therefore would not act as good sacrificial coatings.

By Considering the Standard Reduction Potentials Given in Table 7