Ternary Phase Diagrams: Screencasts

A brief overview of using a triangular phase diagram for a tertiary system (acetone-water-MIBK).

We suggest you list the important points in this screencast as a way to increase retention.

Develops a ternary phase diagram using equilibrium data.

We suggest you list the important points in this screencast as a way to increase retention.

Optional screencast: Interpolating Tie Lines on a Ternary Diagram

Important Equations:

Gibbs Phase Rule for a non-reactive system:     F = 2 + C – P
where F is the number of degrees of freedom, C is the number of components, and P is the number of phases.
Lever rule for two liquid phases (a , b) in equilibrium:

Image to describe lever rule in a ternary phase diagram

where a is the amount of the a  phase, b is the amount of b phase, a and b are distances on the phase diagram, and M is the overall composition of the system.