Problem: Which metal can be used as a sacrificial electrode to prevent the rusting of an iron pipe?a) Agb) Cu c) Mnd) Au

FREE Expert Solution

Loss Electrons → Oxidation

Gain Electrons → Reduction

• ↓ E° → higher tendency to be oxidized

• ↑ E° → higher tendency to be reduced


Fe3+ + 3 e- Fe                   E° = –0.037 V

Ag+ + e- Ag                       E° = 0.7996 V

Cu2+ + 2 e- Cu                  E° = 0.3419 V

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Problem Details

Which metal can be used as a sacrificial electrode to prevent the rusting of an iron pipe?

a) Ag

b) Cu 

c) Mn

d) Au

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