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Identifying the products of combustion

Description

In this demonstration a solid hydrocarbon burns and a pump is used to draw the gaseous combustion products over a piece of cobalt chloride paper and through limewater to show the presence of water and carbon dioxide respectively.

Type of Activity

:
demonstration

Audience

:
Teacher

Age Group

:
11 to 16 years

Credits

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



Apparatus Chemicals

Eye protection

Glass funnel, about 6 cm in diameter

Boiling tubes, 2

Two-holed rubber bungs, 2, to fit the boiling tubes, and fitted with one long and one short piece of glass tubing (see diagram)

Glass or plastic tubing for connections (Note 1)

Filtering pump (Note 2)

Tea light, night light or candle

Piece of blue cobalt chloride paper (TOXIC)

Limewater (treat as IRRITANT), about 20 cm3

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

 







In this demonstration a solid hydrocarbon burns and a pump is used to draw the gaseous combustion products over a piece of cobalt chloride paper and through limewater to show the presence of water and carbon dioxide respectively.

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