Miscibility gap in a ternary system  ![]() Principle A number of completely miscible two component mixtures are prepared to investigate the three component acetic acid / chloroform / water system. These mixtures are titrated with the third component until a two phase system is formed which causes turbidity. The phase diagram for the three component system is plotted in a triangular diagram. Benefits - Good and reproducible results due to temperature control in the experiment.
- Stable and safe construction due to solid stand material
Tasks - Titrate nine different acetic acid / chloroform mixtures with water until a two phase system is formed in each case.
- Titrate six acetic acid / water mixtures with chloroform until phase separation is observed.
- Plot the results of the titrations, expressed as molar fractions, in a triangular diagram.
Learning objectives - Three component system
- Miscibility gap
- Phase diagram
- Triangular diagram
- Gibb's phase law
Necessary accessories - Chloroform
- Precision balance 620g/0.001g
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Immersion thermostat Alpha A, 230 V
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08493-93
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1
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Bath for thermostat, makrolon
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08487-02
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1
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Rack for 20 test tubes, Makrolon
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08487-03
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1
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Burette with straight glass stopcock, 10 ml
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47152-03
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2
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Burette clamp, roller mount., 2 pl.
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37720-00
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1
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Retort stand, h = 750 mm
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37694-00
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1
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Funnels (glass), Boro, various sizes
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34457-00
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1
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Test tubes,160x16mm, 10pcs
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36301-03
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1
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Rubber stoppers, without bore, various diameters
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39254-00
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15
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Rubber stoppers, without bore, various diameters
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39255-00
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15
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Flat-bottom flask, stopper bed, 250 mlSB 29
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MAU-SK17083400
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15
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Pasteur pipettes, 250 pcs
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36590-00
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1
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Rubber caps, 10 pcs
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39275-03
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2
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Beakers, Boro, high form, various sizes
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46032-00
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1
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Wash bottle, plastic, 500 ml
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33931-00
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1
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Laboratory pen, waterproof, black
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38711-00
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1
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Acetic acid 99...100%, pure 1 l
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31301-70
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1
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Water, distilled 5 l
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31246-81
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1
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