VSEPR Theory

1. Write the full and net ionic equations for a reaction and identify spectator ions.

VSEPR

VSEPR: Stands for valence-shell electron-pair repulsion, and it is a model that tells us about the geometric arrangements of electron pairs around a central atom in terms of the electrostatic repulsion between electron pairs.

There are two rules for VSEPR:

1. Double & triple bonds can effectively be treated as single bonds; the approximation suffices for the qualitative purposes of this model.
2. If a molecule has two or more resonance structures, VSEPR can be applied to any of them.

Using VSEPR, it is possible to predict the geometry of molecules.

Number of Electron Pairs	Configuration of Electrons	Geometry	Examples
2	180 Degrees	Linear
3	120 Degrees	Trigonal
4	109.5 Degrees	Tetrahedral