Answer:
![Fe\rightarrow Fe^(2+)+2e^-](https://img.qammunity.org/2020/formulas/chemistry/middle-school/tcw8bfy1nouvvk8k4yeiqkhkcuphab495l.png)
Step-by-step explanation:
The given cell notation is:-
![Fe_((s))|Fe^(3+)_((aq))||Cl_2_((g))|Cl^-_((aq))|Pt](https://img.qammunity.org/2020/formulas/chemistry/college/gl53eq17a8ofkeds3a0d832n5j5fxny8zl.png)
Oxidation reaction is defined as the chemical reaction in which an atom looses its electrons. The oxidation number of the atom gets increased during this reaction.
![X\rightarrow X^(n+)+ne^-](https://img.qammunity.org/2020/formulas/chemistry/high-school/rx48t8e6ti747hbz5tb9q7mr6azq014cgr.png)
The oxidation half reaction of the cell is:-
![Fe\rightarrow Fe^(2+)+2e^-](https://img.qammunity.org/2020/formulas/chemistry/middle-school/tcw8bfy1nouvvk8k4yeiqkhkcuphab495l.png)