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Detergents, soaps and surface tension

Description

Various experiments to observe surface tension of water, and then comparing the effects when using hard water.

Credits

:
This is an experiment from the Practical Chemistry project, developed by the Nuffield Foundation and the Royal Society of Chemistry.
detergents-soaps-and-surf...



Apparatus Chemicals

Each working group will need:

Beaker (250 cm3)

Glass stirring rod

Clean sewing needle (Note 1)

Each working group will need:

Talcum powder, in pepper pot or similar dispenser

Other powders (see Technical notes)

Liquid detergent in a dropping bottle

Liquid soap in a dropping bottle

Access to a supply of purified water (distilled or deionised), about 1 dm3 per working group

Access to a supply of hard water

Refer to Health & Safety and Technical notes section below for additional information.

 







Various experiments to observe surface tension of water, and then comparing the effects when using hard water.

ADDITIONAL INFORMATION

This is a resource from the Practical Chemistry project, developed by the Nuffield Foundation and the Royal Society of Chemistry. This collection of over 200 practical activities demonstrates a wide range of chemical concepts and processes. Each activity contains comprehensive information for teachers and technicians, including full technical notes and step-by-step procedures. Practical Chemistry activities accompany Practical Physics and Practical Biology.