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Measuring the Length of a Molecule - Chemical Demonstration Kit

by Flinn Scientific

Item #: AP5927

Price: $39.75

The Measuring the Length of a Molecule Chemical Demonstration Kit helps students picture the length of a molecule. Using ethyl alcohol solution, lycopodium powder, and oleic acid, students learn of the Langmuir method and micelle formation.

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Help your students visualize the length of a single molecule. First, the surface of water is dusted with lycopodium powder, then a drop of oleic acid solution is placed directly in the center. The oleic acid will spread out in a circle, displacing the lycopodium powder so that it forms a ring that is visible to the eye. By simply measuring the size of the circle formed by the oleic acid with a ruler, you can calculate the length of a single oleic acid molecule. Teacher Demonstration Notes, including step-by-step instructions for the calculation with sample data, are included.Enough materials are provided to perform the demonstration seven times. Concepts: Langmuir method, micelle formation, physical properties. Time Required: 15 minutes Chemicals Provided: Ethyl alcohol solution, lycopodium powder, and oleic acid.