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Dehydration of ethanol to form ethene

Description

Ethanol vapour is dehydrated over a heated catalyst to produce ethene gas. This is tested for properties of an unsaturated hydrocarbon.

Credits

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



Apparatus Chemicals

The teacher and/or each working group will require:

Eye protection

Safety screens (for demonstration)

Boiling tube (Note 1)

Rubber bung, 1 hole – to fit boiling tube

Delivery tube (see diagram)

Bunsen valve (Note 2)

Test-tubes, 6

Corks or bungs, to fit test tubes, 6

Dropping pipette

Bunsen burner

Heat resistant mat

Test-tube rack

Glass or plastic trough, small (Note 3)

Wooden splint

Retort stand, boss and clamp

Ethanol (IDA, Industrial Denatured Alcohol) (HIGHLY FLAMMABLE, HARMFUL), 2 - 3 cm3 (provided in small bottles)

Mineral wool, sufficient for a loosely-packed wad to absorb the liquid at the bottom of the test-tube

Pumice stone or porous pot (unglazed), a supply of small fragments - about pea-sized

Bromine water, 0.02 M (HARMFUL), about 5 cm3 - diluted to pale orange-brown

Acidified potassium manganate(VII) (potassium permanganate) solution, about 0.01 M, about
 5 cm3 (Note 4)

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

 





 


 


Ethanol vapour is dehydrated over a heated catalyst to produce ethene gas. This is tested for properties of an unsaturated hydrocarbon.

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.