VSEPR Shapes

VSEPR - Shapes of molecules are determined by the repulsion of areas of electron density

Areas of Electron Density – bonds and lone pairs

Lone Pair – paired electrons that are NOT shared (bonded)

2 0 CO2

Let’s draw the Lewis structure and build CO2

O.... .. C

.. .. O.. .... O=C=O

.. ......

3 0 AlH3

Let’s draw the Lewis structure and build AlH3

H.

H.

Al. . .H. H–Al–H

H

4 0 CH4

Let’s draw the Lewis structure and build CH4

H.

H.

H..C... H. H–C–H

H

H

4 1 NH3

Let’s draw the Lewis structure and build NH3

H. H.

H. H–N–H

H

..N.. ...

4 2 H2O

Let’s draw the Lewis structure and build H2O

H.H. O... . .. H–O–H

..

..

Lab Time

• Get into groups of 2-4

• Do VSEPR Shapes Lab Stations

Independent Practice

• Finish VSEPR Shapes Individual Practice