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Yes, Pb2+ react with KI.

Pb2+ is lead (II) ion
KI is a compound. It is a combination of potassium (K) and iodine (I). It is called potassium iodide.

Both potassium and iodine are highly reactive elements. Thus, when they are combined with another element like Pb2+, Pb2+ reacts with KI

Answer: Yes, lead ion will react with potassium iodide.

Explanation: When lead ion reacts with KI, a bright yellow colored precipitate is formed.

The reaction of these two follows:

\(Pb^{2+}(aq.)+2KI(aq.)\rightarrow PbI_2(s)+2K^+(aq.)\)

Hence, \(Pb^{2+}\) ion reacts with KI to yield \(PbI_2\)

This test is the confirmatory test for lead ion which is present in Group I.

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