Answer:
The half-reaction takes place at the surface of the magnesium bar is the oxidation process (losing of electrons). The chemical equation is as follow:
[tex]Mg(s) -----> Mg^{2+}\\[/tex]
Explanation:
In the given situation, two reactions take place
1. On the surface of magnesium bar:
As magnesium bar acts as anode so on the surface of magnesium bar, oxidation take place. Oxidation is a chemical reaction that result in the loss of electrons and oxidation state of magnesium increases to 2 as shown in the following equation:
[tex]Mg(s) -----> Mg^{2+}\\[/tex]
2. On the surface of iron pipe:
Corrosion is a natural process which results in the deterioration or destruction of materials, in this case, it is iron.
