1. LABORATORY ASSIGNMENT 6
CHEMISTRY 1
Tupaz, Ishi Pearl C. BMLS 1-E
1. What type of molecular forces influence the properties of an organic compound?
Intermolecular Forces
2. Give the type of forces present in polar molecules and non-polar molecules.
Polar Molecules
Dipole-Dipole Forces
London Dispersion Forces
Ion-Dipole Interactions
Hydrogen Bonding
Dipole-Induced Dipole Interaction
Non-Polar Molecules
London Dispersion Forces
Van der Waals Forces
Dipole-Induced Dipole Interaction
3. How does these forces affects the boiling point of liquids and melting point of solids?
Boiling point of liquids
Higher the intermolecular forces between the liquid particles, harder it is
for it to escape into the vapor phase, you need more energy to convert it
from liquid to the vapor phase, in other words, higher its boiling point.
Melting point of solids
Intermolecular forces have a strong influence on melting point. One major
factor that impacts the melting point of the compound is the type of
intermolecular forces that exist within the compound. Intermolecular
forces are either attractive or repulsive between the molecules of a
compound. In the solid phase, the molecules of a compound will form an
organized lattice structure as the molecules are packed close together.
2. 4. Explain the generalization of solubility that says “Likes dissolves likes”.
In general, "Like dissolves like", describes the general principle of solubility
(polar solvents dissolve polar solutes and non-polar solvents dissolve non-
polar solutes). Thus, mineral acids, bases and salts, which are polar, tend
to be much more soluble in water, which is polar, than in solvents such as
ether or hexane, which are essentially non-polar. Non-polar compounds,
on the other hand, appear to be just slightly soluble in water, but very
soluble in solvents which are non-polar.
