Why is #Cl_2 + KI -> KCl + I_2#? not a synthesis reaction?
Not Synthesis. It is a Single Displacement.
Synthesis reactions are defined as following:
However, single displacement reactions are defined as following:
Which is the case of the reaction in question:
The balanced equation is:
Here is a video about the type of chemical reactions:
Lab Experiment #3: Types of Chemical Reactions.