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Comparing light and heavy-duty detergents

Description

Light-duty detegents are weakly alkaline, while heavy-duty detergents are moderately alkaline. The differing effects these have is investigated using standard washing conditions.

Credits

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This resource has been provided by, or developed in partnership with, Nuffield Foundation
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Apparatus Chemicals

Each working group will need:

Eye protection

Beakers (1 dm3), 2

Stirrers (Note 2)

Tongs or a glass stirring rod

Bunsen burner

Tripod and gauze

Thermometer, 0 - 110°C (Note 3)

Heat resistant mat or Stirrer-hotplate

Squares of standardised soiled cloth, 2 (Note 4)

Full-range indicator paper strips, 2

For extension work on dyes:

Dyed wool samples (Notes 5 and 6)

Detergent solution, light-duty, 250 cm3(Note 1)

Detergent solution, heavy-duty, 250 cm3  (Note 1)

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

 







Light-duty detegents are weakly alkaline, while heavy-duty detergents are moderately alkaline. The differing effects these have is investigated using standard washing conditions.

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.