Which, If Any, of the Following Metals Would Be Capable $\degree$

question 79

Multiple Choice

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

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

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