The two compounds that react are:
Potassium iodide: KI
Lead (II):
[tex]Pb^{+2}[/tex]When the two solutions are mixed the following reaction takes place:
[tex]2KI(aq)+Pb^{+2}(aq)\text{ }\rightarrow2K^{+1}(aq)+PbI_2\text{ (s)}[/tex]The resulting product is called lead (II) Iodide.