Laboratory Teaching Exercises
23
perform the trial at a temperature below the ambient temperature, the optional chilled
water circulator CW-17 (not supplied) must be connected to the coil in the reactor
vessel.
Before carrying out reactions involving any other reagents please refer to Armfield
Ltd. for advice.
Dilution of Ethyl Acetate
Armfield recommends the use of a 0.1M solution of Ethyl Acetate in the CEM MkII
reactor. This should be made by diluting concentrated Ethyl Acetate as follows:
Therefore add 9.79ml of concentrated Ethyl Acetate to 900ml of deionised or distilled
water.
Shake the mixture vigorously until the two liquids have mixed. Add further water to
make up the final volume to 1000ml.
Note:
The practice of making a strong solution (e.g. 1M) then further diluting this to
the required concentration (e.g. 0.1M) cannot be applied when using Ethyl Acetate.
The required dilution should be made directly as stated above.
Dilution of Sodium Hydroxide
Armfield recommends the use of a 0.1M solution of Sodium Hydroxide in the CEM
MkII reactor. This may be made by adding 4.0g of NaOH to 960ml of deionised water
then making up the solution to 1000ml.
