The formation of a sol

Description

A rusty-brown precipitate of iron(III) hydroxide is converted into a cherry-red iron(III) oxide sol (a colloidal suspension)

Credits

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

 


 


Apparatus Chemicals

Eye protection

Access to a fume cupboard (Note 1)

Beaker or conical flask (1 dm3)

Test-tube

Boiling tube

Teat pipette

Bunsen burners, 2

Tripod and gauze

Heat resistant mat

Filter funnel and filter paper (optional)

Cellophane sheet, small piece for filtering (optional)

Solid hydrated iron(III) chloride, about 8 g

Deionised (or distilled water), about 500 cm3

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

 

 


 


 




A rusty-brown precipitate of iron(III) hydroxide is converted into a cherry-red iron(III) oxide sol (a colloidal suspension)

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.