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Controlled explosion of a hydrogen-air mixture

Description

This demonstration is used to show how a hydrogen-air mixture can change in composition to gain explosive properties.

Type of Activity

:
demonstration

Audience

:
Teacher

Age Group

:
11 to 18 years

Credits

:
This resource has been provided by, or developed in partnership with, Nuffield Foundation
controlled-explosion-of-a...



Apparatus Chemicals

Eye protection for the demonstrator

Ear protectors for the demonstrator

Safety screens, 2

‘Fizzy’ drink bottle, 1 dm3, no larger (Note 1)

One-holed bung, to fit bottle

Short length of glass tubing (about 5 cm), to fit in bung (Note 1)

Short length (about 5 cm) of rubber tubing, to fit glass tube (Note 1)

Hoffman or screw clip, for rubber tubing

Gas delivery tube

Large plastic or glass trough, for collecting gas over water

Boss, clamp and stand

Wooden splints (Note 2)

A source of hydrogen gas (EXTREMELY FLAMMABLE): cylinder and regulator fitted with a length (about 50 cm) of rubber tubing

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

 

 







Page last updated October 2015

This demonstration is used to show how a hydrogen-air mixture can change in composition to gain explosive properties.

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