EFFECTS OF HYDROGEN BONDING
PRESENTED BY TASMIA RIAZ
1. SOLUBILITY
 Covalent compounds generally do not
dissolve in water
 But, those which it forms a hydrogen bond
with water readily dissolve in it.
EXAMPLE:
Aldehydes and ketones are soluble in water
due to the formation of hydrogen bonds
2. BOILING POINTS
 Due to the presence of H-bonding in the
compounds, more energy is required to break
the bonds.
 Therefore, boiling point of HF, H2O have
abnormally high boiling points due to the
formation of hydrogen bonding between the
molecules.
FOR EXAMPLE
Formaldehyde
3. Effects on acidity on hydrogen bonding
The effect of intramolecular hydrogen bonding
on acidity can be seen but not just on O-H
and N-H , where acidity is greatly reduced,
but also on certain C-H groups , which in
some case become the primary source of
acidity.
4. ON VISCOSITY
Due to an increase in the size and mass of the
molecules of the liquid experience greater
resistance . As a result viscosity of a liquid
increases. Therefore, the liquid with extensive
hydrogen bonding show higher viscosity.