Skip to main content

Diffusion of gases - ammonia and hydrogen chloride

Description

In this demonstration solid white ammonium chloride is formed because of gaseous diffusion.

Credits

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



Apparatus Chemicals

For one demonstration:

Eye protection (goggles)

Access to a fume cupboard

Protective gloves, preferably nitrile

A length of glass tube about half a metre long with an inside diameter of about 2 cm (Note 1)

Retort stands with bosses and clamps, 2

Small wads of cotton wool, 2

Bungs, to fit into the ends of the glass tube, 2

Strip of universal indicator paper (optional)

Concentrated hydrochloric acid (CORROSIVE), a few cm3 (Note 2)

880 ammonia solution (CORROSIVE, DANGEROUS FOR THE ENVIRONMENT), a few cm3 (Note 2)

Acetone (FLAMMABLE), a few cm3 (optional) (Note 1)

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

 






In this demonstration solid white ammonium chloride is formed because of gaseous diffusion.

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.