Question

Reduction potential of two metals M1 and M2 are -2.3 V and 0.2 respectively. Predict which one is better for coating the surface of iron.

Answer 1

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• Reduction potential of metal M1 is -2.3 eV
• Reduction potential of metal M2 is 0.2 eV

• So, oxidation potential of metal M1 and metal M2 are respectively 2.3 eV and -0.2 eV

• We know that iron can easily oxidise in atmosphere...so we should choose a metal whose oxidation potential is higher than iron.
• Here oxidation potential of metal M1 is high..

• So, metal M1 is better for coating the surface of iron....