The standard electrode potentials of a metal G and iron are given below. Fe2+(aq) + 2e---->Fe(s) -0.44VG2+(aq) + 2e---->G(s) ...

      

A piece of iron is coated with metal G. If the coating is scratched, would the iron be protected from rusting? Explain.

  

Answers


Davis
Assume metal G corrodes:
G(s) + Fe2+(aq)----->G2+(aq) + Fe(s)
Ecell= -0.44 – (-0.91)
= +0.47 V
Iron would be protected from rusting because the e.m.f. is positive.

Githiari answered the question on September 13, 2017 at 02:18


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