Phosphorus pentachloride PCl5 is a molecule with phosphorus P as the central atom and five chlorine Cl atoms surrounding it. To determine the VSEPR geometry, we first need to identify the number of electron groups around the central atom.In PCl5, the central phosphorus atom has 5 valence electrons. Each chlorine atom contributes one electron, making a total of 5 additional electrons from the chlorine atoms. Therefore, there are 5 electron groups around the central phosphorus atom, and all of them are bonding pairs no lone pairs .According to the VSEPR theory, the electron groups will arrange themselves to minimize repulsion. For 5 electron groups, the geometry is trigonal bipyramidal. In this arrangement, three chlorine atoms form an equatorial triangle around the phosphorus atom, and the other two chlorine atoms are positioned axially, above and below the central atom.The bond angles in a trigonal bipyramidal geometry are:1. Axial-equatorial Cl-P-Cl : 90 degrees2. Equatorial-equatorial Cl-P-Cl : 120 degreesSo, the VSEPR geometry of PCl5 is trigonal bipyramidal with bond angles of 90 degrees axial-equatorial and 120 degrees equatorial-equatorial .