What is PbI2? Important knowledge about PbI2

1. Definition of PbI₂

PbI₂, commonly known as Lead(II) Iodide in English. It is a chemical compound, consisting of lead (plumbum, Pb) and iodine (I) atoms. The lead atom in the PbI₂ molecule has a proton number of 82, in group IV, period 6 of the periodic table. The iodine atom has a proton number of 53, belonging to group VII, period 5. Each lead atom combines with two iodine atoms to form the PbI₂ molecule. This compound has an ionic structure is Pb₂+ and I-.

2. Properties of PbI₂

2.1 Physical properties: PbI₂ is solid at room temperature, pale yellow in color. It does not have a distinct smell. This is a chemical that is neither acidic nor alkaline, so its pH is 7.

2.2 Chemical properties: PbI₂ is insoluble in water but can dissolve in hot water. It also readily reacts with acids or other compounds to form new compounds.

3. Common chemical formulas of PbI₂

PbI₂ reacts with concentrated acid to form PbI₄ compound.

• PbI₂ + 2HNO₃ -> Pb(NO₃)₂ + 2HI
• PbI₂ + 2HCl -> PbCl₂ + 2HI

4. Synthesis of PbI₂

4.1 Laboratory synthesis of PbI₂: PbI₂ can be synthesized by reacting lead with concentrated iodine solution.

• Pb + 2I₂ -> PbI₂

4.2 Industrial synthesis of PbI₂: In industry, PbI₂ is synthesized through the process of oxidizing lead with iodine.