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Microscale preparation of ethyl benzoate

Description

In this experiment you will be preparing the ester ethyl benzoate by warming ethanol and benzoic acid in a plastic pipette in a water bath.

Credits

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



Apparatus Chemicals

Eye protection

Each group will require:

Measuring cylinder, 5 cm3

Beaker, 10 cm3

Plastic dropping pipettes, 4

Thermometer, 0 -110°C

Beaker, 100 cm3

Heat resistant mat

Access to top-pan balance, weighing to 0.01 g

Bunsen burner, tripod and gauze

or

Access to an electric hotplate, with thermostatic control

or

Access to thermostatically controlled water bath set at 70 - 80°C

Ethanol, (IDA, Industrial Denatured Alcohol) (HIGHLY FLAMMABLE, HARMFUL), 1 cm3

Benzoic acid (HARMFUL), about 0.5 g

Concentrated sulfuric acid (CORROSIVE), access to small quantity

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

 






In this experiment you will be preparing the ester ethyl benzoate by warming ethanol and benzoic acid in a plastic pipette in a water bath.

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 .