SCH 3U1
POLARITY OF MOLECULES
Draw the following Lewis diagrams: N2, CH2O, CH4, H2O
Fill in the following chart.
Molecule
Bond
Polarity
Molecular
Polarity
State of
Substance
Solubility in
Water
N2
CH2O
CH4
H2 O
1.
Bond polarity describes the location of the ___________
between two atoms. It may be classified as covalent (equal
sharing) and polar covalent (unequal sharing) or ionic
(complete transfer).
2.
Molecular polarity describes the location of electrons
around a neutral molecule. This is due to the ___________
of the atoms. If the electrons are more concentrated at
one end of a molecule, it is described as being polar. That
is, having a slight positive and negative pole. This slight
charge is denoted by the symbol – δ. If there are no areas
where electrons are concentrated within a molecule, the
molecule is described as being non-polar (no poles).
3.
Solid, liquid or gas at room temperature?
4.
Is the substance soluble in water (a polar sovent)?