Exercise 1 | Prediction of Molecular Geometries

What is the electron pair geometry and the molecular shape of the following molecules:


H2O, SiO2, AlCl3 and PCl5 ?

Electron Pair Geometry = EPG; Molecular Shape = MS


H2O ⇒ AX2E2 ⇒ EPG = tetrahedral, MS = bent

SiO2 ⇒ AX2 ⇒ EPG = linear, MS = linear

AlCl3 ⇒ AX3 ⇒ EPG = trigonal planar, MS = trigonal planar

PCl5 ⇒ AX5 ⇒ EPG = trigonal bipyramidal, MS = trigonal bipyramidal