Which, If Any, of the Following Metals Would Be Capable

question 5

Multiple Choice

Which, if any, of the following metals would be capable of acting as a sacrificial anode when used with iron pipe? E°_Fe = −0.44 V; all E° values refer to the M²⁺/M half-cell reactions.

• A)copper, Cu, E° = 0.15 V
• B)cobalt, Co, E° = −0.28 V
• C)chromium, Cr, E° = −0.74 V
• D)tin, Sn, E° = −0.14 V
• E)None of these metals would be capable of acting as a sacrificial anode with iron.

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