Ch. 6 Polarity, Lewis Structures

Front

What is polarity in chemistry?

Back

Polarity refers to the distribution of electrical charge over the atoms joined by the bond. A polar molecule has a partial positive charge on one end and a partial negative charge on the other end.

Front

What is a Lewis structure?

Back

A Lewis structure is a diagram that represents the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule.

Front

What does VSEPR stand for?

Back

VSEPR stands for Valence Shell Electron Pair Repulsion, a theory used to predict the geometry of individual molecules.

Front

What is the VSEPR shape of a molecule with four bonding pairs and no lone pairs?

Back

The VSEPR shape is Tetrahedral.

Front

What is the VSEPR shape of a molecule with three bonding pairs and one lone pair?

Back

The VSEPR shape is Trigonal Pyramidal.

Front

What intermolecular forces are present in polar molecules?

Back

Polar molecules exhibit Dipole-Dipole interactions and may also have Hydrogen bonding if they contain N-H, O-H, or F-H bonds.

Front

What is the difference between London Dispersion Forces and Dipole-Dipole interactions?

Back

London Dispersion Forces are weak intermolecular forces arising from temporary dipoles in molecules, while Dipole-Dipole interactions occur between polar molecules due to their permanent dipoles.

Front

How do you determine the polarity of a molecule?

Back

To determine polarity, assess the electronegativity differences between atoms and the molecular geometry. If the molecule has a net dipole moment, it is polar.

Front

What is the significance of lone pairs in determining molecular shape?

Back

Lone pairs occupy space and repel bonding pairs, affecting the overall geometry of the molecule according to VSEPR theory.

Front

What is the VSEPR shape of the molecule SO2?

Back

The VSEPR shape of SO2 is Bent.