Organic chemistry > alcohol

Ethanol vapour is dehydrated by passing over a heated catalyst to produce ethene gas. This is collected over water and tested for typical properties of an unsaturated hydrocarbon.

A demonstration of the hydration of alkenes. Students react hex-1-ene, CH3CH2CH2CH2CH=CH2, with concentrated sulfuric acid, followed by water, to make hexan-2-ol, CH3CH2CH2CH2CH(OH)CH3. The hexan-2-ol is then distilled as a teacher demonstration and the

Ethanol is reacted with phosphorus tribromide in a substitution reaction to give bromoethane.

Ethanol is oxidised by acidified sodium dichromate in a test-tube reaction, firstly to form ethanal (acetaldehyde), and with further oxidation, ethanoic acid (acetic acid). The experiment is most appropriate for post-16 students.

Ethanol and propan-1-ol are tested for pH, reaction with sodium, combustion and oxidation with acidified dichromate(VI) solution.

In this experiment students investigate the reactions between a range of alcohols and acids on a test-tube scale, to produce small quantities of a variety of esters quickly.

The ester, ethyl benzoate, is prepared using a microscale technique, from benzoic acid and ethanol mixed in a plastic pipette and warmed in a waterbath. The ester is identified by smell.