What is PF5? Important knowledge about PF5

1. Definition of PF₅
   PF₅, also known as Pentafluorophosphorane or Fluorophosphane in English, is a colorless compound of Phosphorous and Fluorine. The molecular structure of PF₅ consists of a central Phosphorous atom surrounded by five Fluorine atoms. PF₅ has a molar mass of 127.96 and an average atomic weight of 31.0 g/mol. In the atmosphere, PF₅ can exist as the ion PF₆-.

2. Properties: PF₅
   PF₅ is a colorless, odorless solid. Under normal conditions, PF₅ has a neutral pH. PF₅ has the ability to react with water to form HF and POF₃, and can also react with alkaline substances to form alkaline Phosphorus compounds.

3. Common chemical equations involving PF₅
   PF₅ often reacts with metals, acids, and nonmetals.

Examples:

• PF₅ + KOH -> KPF₆ + HF
• PF₅ + H₂O -> POF₃ + 5HF
• PF₅ + P₄ -> 4PF₃

4. Preparation of PF₅
   In practice, PF₅ is not prepared in the laboratory due to its toxicity and high corrosiveness. On an industrial scale, PF₅ is usually prepared from PCl₅ and HF:
   PCl₅ + 5HF -> PF₅ + 5HCl.