10 Br2 + P4 → 4 PBr5

This is an oxidation-reduction (redox) reaction:

20 Br0 + 20 e- → 20 Br-I (reduction)

4 P0 - 20 e- → 4 PV (oxidation)

Br2 is an oxidizing agent, P4 is a reducing agent.

Reactants:

  • Br2
    • Names: Bromine source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Molecular bromine source: NIOSH NPG, accessed: 2019-09-02
    • Appearance: Fuming red-to-brown liquid with pungent odour source: ICSC, accessed: 2019-09-04; Dark reddish-brown, fuming liquid with suffocating, irritating fumes. source: NIOSH NPG, accessed: 2019-09-02
  • P4

Products:

  • PBr5 – Phosphorus pentabromide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Other names: Phosphorus(V) bromide source: wikipedia, accessed: 2019-09-27
    • Appearance: Yellow solid source: wikipedia, accessed: 2019-09-27