Question

In: Chemistry

Which of these metals does not act as a sacrificial electrode for iron?


Which of these metals does not act as a sacrificial electrode for iron?

Mg
Mn  
Zn
Cu

Solutions

Expert Solution

answer : Cu

Explanation :

the reduction potenitial of iron = - 0.44 V

the reduction potential values of given elements :

Mg = - 2.37 V

Mn = - 1.185 V

Zn = - 0.76 V

Cu = + 0.34 V

the elements which are less than the reduction potential vlaues of iron are act as sacrificial eletrodes.

here Cu does not act as sacrificial electrode. because this have high reduction potential.

queen_honey_blossom answered 2 years ago
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