5 Cl2 + 2 P → 2 PCl5

This is an oxidation-reduction (redox) reaction:

2 P0 - 10 e- → 2 PV (oxidation)

10 Cl0 + 10 e- → 10 Cl-I (reduction)

P is a reducing agent, Cl2 is an oxidizing agent.

Reactants:

  • Cl2
    • Names: Chlorine source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Molecular chlorine source: NIOSH NPG, accessed: 2019-09-02
    • Appearance: Greenish-yellow compressed liquefied gas with pungent odour source: ICSC, accessed: 2019-09-04; Greenish-yellow gas with a pungent, irritating odor. [Note: Shipped as a liquefied compressed gas.] source: NIOSH NPG, accessed: 2019-09-02
  • P

    Products:

    • PCl5 – Phosphorus pentachloride source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Phosphorus(V) chloride source: wikipedia, accessed: 2019-09-27
      • Other names: Pentachlorophosphorane source: wikipedia, accessed: 2019-09-27, Pentachlorophosphorus source: wikidata, accessed: 2019-09-02source: NIOSH NPG, accessed: 2019-09-02, Phosphoric chloride source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02
      • Appearance: Colourless crystals source: wikipedia, accessed: 2019-09-27; Fuming white-to-yellow crystals with pungent odour source: ICSC, accessed: 2019-09-04; White to pale-yellow, crystalline solid with a pungent, unpleasant odor. source: NIOSH NPG, accessed: 2019-09-02