Create a beautiful, red, white and blue density column to demonstrate the salting-out effect, relative density, and the miscibility of organic solvents with water. The density column contains three liquid layers consisting of toluene, methyl alcohol, and water. Methyl alcohol is “salted out” and separated from water by adding potassium carbonate. The water is dyed blue with copper(II) sulfate, and the toluene is colored red with Sudan III. Why don't the methyl alcohol and toluene mix? Store the multicolored density column for up to a month in the glass bottle with chemical-resistant cap included with the kit. The attention-getting display is sure to generate lots of interest, giving you a great lead-in for lessons on density, polarity or solubility! Enough materials are included to perform the demonstration seven times.
Concepts: Solubility, density, miscible and immiscible liquids, salting-out effect.
Time Required: 30 minutes
Materials Provided: Copper(II) sulfate, methyl alcohol, potassium carbonate, Sudan III dye, toluene, glass demonstration bottle with chemical-resistant cap.
Note: Perform this demonstration in a fume hood or well-ventilated lab.
Additional ResourcesNo Additional Resources at the time.
Flinn Catalog/Reference Manual Page 384
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