Final answer:
The formula provided seems to have a typographical error. For a single displacement reaction, MgCl2 can react with another metal (e.g. Zinc), wherein Zinc displaces Magnesium, forming Zinc Chloride and liberating Magnesium.
Step-by-step explanation:
The formula provided in your question, mMgCl₁₂²⁺, appears to have a typographical error. A magnesium chloride formula should be represented as MgCl2, signifying one magnesium atom (Mg) to two chlorine atoms (Cl). As for the possibility of a single displacement reaction, additional information, such as the presence of another reactant, is needed.
If we take this into account and consider another metal, say Zinc (Zn), the reaction would proceed as follows: MgCl2 + Zn → ZnCl2 + Mg. In this case, Zinc displaces Magnesium to form a compound, Zinc Chloride (ZnCl2), freeing Magnesium in the process. This is an example of a single displacement reaction.
Learn more about Single Displacement Reaction