BTEC Applied Science Unit 4 Learning Aim C

Risk Assessment
Cause of Risk Risk In case of Prevention
Salicylic Acid Is an Irritant that could Wash mouth and Wear goggles and
cause chemical burns if quickly seek medical gloves
digested help
Ethanoic Anhydride Highly Corrosive. Seek medical help. Wear goggles and
Contact can cause gloves. Handle in a
burns. Breathing in can fume cupboard.
cause lung damage and
irritant.
Ethanol Flammable Seek medical help Wear goggles and
gloves. Keep away from
fires.
Heating Mantle Could cause burns Run under cold water Keep hands away from
and seek medical help the hot surface.

Methodology
Part 1 – Preparation
Equipment
 Salicylic Acid
 10cm3 measuring cylinder
 Ethanoic anhydride
 Sulfuric Acid
 400cm3 Beaker
 100cm3 Conical Flask
 Heating Mantle
 250cm3 Beaker
 Reduced Pressure Filtration Apparatus
 Filter Paper Stirring Rod
 Thermometer
 Distilled Water
 Spatula
 Mass Balance

Method
1. In A 100cm3 conical flask, weigh out 6.00g of Salicylic acid and record the mass used
2. In a fume cupboard fill the Conical flask with 10cm3 of ethanoic anhydride using a measuring
cylinder and stir until dissolved
3. Still in the fume cupboard add five drops of sulfuric acid it ensures all the salicylic acid has
dissolved and mix more.
4. On a heating mantle heat up the flask in a 400cm3 beaker with hot water in to around 60oC but
do not let it goes over 65oC
5. Allow the flask to cool a bit before the liquid into a beaker containing 75cm3 of distilled water
6. Swirl the beaker quickly to allow the solid to precipitate