Editing Lead(II) iodide (section)

== Preparation ==

{{chem|Pb|I|2}} is commonly synthesized via a precipitation reaction between [[potassium iodide]] {{chem|K|I}} and [[lead(II) nitrate]] {{chem|Pb}}({{chem|N|O|3}})<sub>2</sub> in water solution:

: {{chem2|Pb(NO3)2 + 2 KI → PbI2 + 2 KNO3}}

While the potassium nitrate {{chem|K|N|O|3}} is soluble, the lead iodide {{chem|Pb|I|2}} is nearly insoluble at [[room temperature]], and thus [[precipitate]]s out.<ref name=Ahmad/>

Other soluble compounds containing lead(II) and iodide can be used instead, for example [[lead(II) acetate]]<ref name=Dhiaputra/> and [[sodium iodide]].

The compound can also be synthesized by reacting [[iodine]] vapor with molten [[lead]] between 500 and 700&nbsp;°C.<ref name="matuz" />

A thin film of {{chem|Pb|I|2}} can also be prepared by depositing a film of [[lead(II) sulfide|lead sulfide]] {{chem|Pb|S}} and exposing it to iodine vapor, by the reaction

: {{chem2|PbS + I2 → PbI2 + S}}

The [[sulfur]] is then washed with [[dimethyl sulfoxide]].<ref name="chaud" />