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Summary Experiment of Three component systems
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Experiment 3Three component systems
i. Introduction
It is essential that the reader becomes familiar with certain “rules”
that relate to the use of triangular coordinates. It should have been
apparent in discussing two-component systems that all concentrations
were expressed on a weight–weight basis. This is because, although it is
an easy and direct method of preparing dispersions, such an approach also
allows the concentration to be expressed in terms of the mole fraction or
the molality. The concentrations in ternary systems are accordingly
expressed on a weight basis
ii. Rules relating to the triangular diagram
, 1) Each of the corners or apexes of triangle represent 100% by
weight of one component (A, B & C) as a result ,the same apex
will represent 0% of the other two components.
2) The area within the triangle represents all possible combinations
of A, B& C to give three component systems.
3) If a line is drawn through any apex to a point on the opposite
side, then all systems are represented by points on such line have
constant ratio of two components.
4) Any line drawn parallel to one side of the triangle represents
ternary systems in which the proportion (or % by weight) of one
component is constant.
For example:
Of A and C together.
Applying similar arguments to the other two components in the
system, we can say that along the line AB, C = 0. The point x lies on the
line parallel to AB that is equivalent to 30% of C. It follows, therefore,
that the concentration of A is 100 - (B + C) = 100 - (15 + 30) = 55%. This
is readily confirmed by proceeding across the diagram from the line BC
toward apex A; point x lies on the line equivalent to 55% of A.
Then find the percent of H, E, F, and G?
(Another example is used in the presentation)
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