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Chemiluminescence of luminol - a cold light experiment

Description

This experiment shows that the energy of a chemical reaction can be given out as light as well as heat.

Credits

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



Apparatus Chemicals

The teacher will require:

Eye protection

Conical flasks with stoppers (1 dm3), 2

Beaker (2 dm3)

Thermometer (0 – 100 °C)

Balance (1 d.p.)

Quantities of chemicals for one demonstration:

Household bleach 100 cm3 OR sodium chlorate(I) solution (up to 14%) (CORROSIVE / IRRITANT) (Notes 1, 2 and 3)

Luminol (3-aminophthalhydrazide), 0.4 g (IRRITANT) (Note 4)

Sodium hydroxide pellets, 4.0 g (CORROSIVE)

Fluorescein (or sodium fluorescein) powder (optional)

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

 

 


 




 




This experiment shows that the energy of a chemical reaction can be given out as light as well as heat.

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.

The experiment is also part of the Royal Society of Chemistry's Continuing Professional Development course: Chemistry for non-specialists