Which, If Any, of the Following Metals Would Not Be

question 94

Multiple Choice

Which, if any, of the following metals would not be capable of acting as a sacrificial anode when used with iron E°_Fe = -0.44 V; all E° values refer to the M²⁺/M half-cell reactions.

• A) manganese, Mn, E° = -1.18 V
• B) cadmium, Cd, E° = -0.40 V
• C) magnesium, Mg, E° = -2.37 V
• D) zinc, Zn, E° = -0.76 V
• E) All of these metals are capable of acting as sacrificial anodes with iron.

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