chemistry

1. PHYSICAL CHEMISTRY
PHASE DIAGRAM

2. Phase diagram
3 components Example of ternary phase diagram

3. Example of ternary phase diagram
tie-line
Plait Point, and it is
another example of a
critical point, where
the composition of the
two phases is equal

4. Graphical representation of
a three-component system
at constant T & p

5. Typical Phase Diagram of Three-Component
Systems
A-B miscible
A-C miscible
B-C partially
miscible
A-C miscible
A-B & B-C
partially
miscible
A-B, A-C &
B-C partially
miscible

6. the three
components are
very insoluble in
each other
P = 3
the two
components are
very insoluble in
each other
If the curves do
not join at the
plait points, the
diagram takes
the form of

7. Effect of temperature on ternary phase diagram

8. Determination of the Tie Lines
their composition can be
determined by titrating the
acetic acid they contain
with standard base
If the two layers s1′ and s1″ are
separated with a separatory
funnel
From the weight of the
layer titrated and the
weight of the acetic acid
it contains, the weight
fraction of acetic acid can
be calculated

9. The Common Ion Effect
P = 2
P = 1, L
P = 3
P = 2
L +
NH4Cl(s)
L + (NH4)2SO4(s)
L + NH4Cl(s) + (NH4)2SO4(s)
The presence of a
common ion tends
to decrease the
solubility of a salt