Question

MgCl2 + Br2 MgBr2 + Cl2
This equation shows that Mg is (oxidized or reduced).
This equation shows that Br2 is (oxidized or reduced).
Can this redox reaction take place?

Answer 1

Mg is neither oxidized nor reduced. Looking at the charges on both sides will tell you. As a reactant, the charge of the Mg is +2. As a product, it's still a +2.