A-level Chemistry exemplar for required practical 10- part b
Preparation of a pure organic liquid:
The preparation of ethyl ethanoate.
Student sheet
An ester is a chemical compound that is formed when an organic acid reacts with an alcohol.
Esters frequently have distinctive odours and are naturally occurring flavour and fragrance
chemicals in many fruits and plants. In this practical, the ester ethyl ethanoate is prepared and
purified by distillation.
Requirements
Stage 1: Preparation of ethyl ethanoate
12 cm³ glacial ethanoic acid 18
10 cm³ ethanol 27
15 drops concentrated sulfuric acid 22:5
anti-bumping granules
disposable dropping pipetie
10 cm³ measuring cylinde 15
25 cm measuring cyinder 375
250 cm³ beaker
50 cm pear-shaped fiask 75
condenser (with rubber tubig
clamp stand
clamps and bosses
heatproof mat
Bunsen burner
tripodand gauze.
Stage 2: Isolation of ethyl ethanoate
4.5 g sodium carbonate (15
15 cm distilled or deionised water 2 2
100 cm beaker
50cm³ beaker
separating funnel and stopper
anhydrous sodium sulfate
boiling tube S
50 cm³ pear-shaped flask. 7
A0A Educạtion (A0A) is a registered charity (nurmber 1073334) and a company limited by guarantee registered in 145 of 175
England and Wales (rnurmber 3644723). Our regıstered address is A0A, Devas Street, Manchester M15 6EX,
Preparation of a pure organic liquid:
The preparation of ethyl ethanoate.
Student sheet
An ester is a chemical compound that is formed when an organic acid reacts with an alcohol.
Esters frequently have distinctive odours and are naturally occurring flavour and fragrance
chemicals in many fruits and plants. In this practical, the ester ethyl ethanoate is prepared and
purified by distillation.
Requirements
Stage 1: Preparation of ethyl ethanoate
12 cm³ glacial ethanoic acid 18
10 cm³ ethanol 27
15 drops concentrated sulfuric acid 22:5
anti-bumping granules
disposable dropping pipetie
10 cm³ measuring cylinde 15
25 cm measuring cyinder 375
250 cm³ beaker
50 cm pear-shaped fiask 75
condenser (with rubber tubig
clamp stand
clamps and bosses
heatproof mat
Bunsen burner
tripodand gauze.
Stage 2: Isolation of ethyl ethanoate
4.5 g sodium carbonate (15
15 cm distilled or deionised water 2 2
100 cm beaker
50cm³ beaker
separating funnel and stopper
anhydrous sodium sulfate
boiling tube S
50 cm³ pear-shaped flask. 7
A0A Educạtion (A0A) is a registered charity (nurmber 1073334) and a company limited by guarantee registered in 145 of 175
England and Wales (rnurmber 3644723). Our regıstered address is A0A, Devas Street, Manchester M15 6EX,
