physical chemistry phase diagram 3 components
TRANSCRIPT
PHYSICAL CHEMISTRY
PHASE DIAGRAM
Phase diagram
3 components Example of ternary phase diagram
Example of ternary phase diagram
tie-line
Plait Point, and it is another example of a critical point, wherethe composition of the two phases is equal
Graphical representation of
a three-component system
at constant T & p
Typical Phase Diagram of Three-Component
Systems A-B miscibleA-C miscibleB-C partially miscible
A-C miscibleA-B & B-C partially miscible
A-B, A-C & B-C partially miscible
the three components are very insoluble in each other
P = 3
the two components are very insoluble in each other
If the curves donot join at the plait points, the diagram takes the form of
Effect of temperature on ternary phase diagram
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 separatoryfunnel
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
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 thesolubility of a salt