Materials
Two well plates 6,
lid for well plate 6, silicone rubber tube 12 cm, needle, microscaled spirit
burner (1 mL), 5 mL, 5 mL distillation vial with septum, clamp, water
or ethanol solutions for distillation.
a)
Preparation of the distillation system
1. Put into the distillation
flask 3-4 mL of the solution to be distilled.
....This
solution can be a Coca-Cola drink, water colored solution (by food dye),
ethanol with food dye in it etc.
2. Set the distillation
apparatus as described in the left figure.
b)
The distillation process
1. Hold the distillation
vial with a clamp and heat it gently over the microburner.
2. The well plate 6 has
to be immersed in ice-water.
3. Control the distillation
by lifting or lowering the distillation vial.
...The
distillate should come out clear. If some color comes out with the distillate,
stop the distillation and restart it.
4. When the distillation
is over, stop the heating and remove the lid from the collecting well.
....Not
doing so causes the drawback of distillate to the distillation flask.
c)
Checking the distillate
If the distillate (photo
2) is pure water, a drop of will turn the colour of anhydrous
CuSO4 into blue and the colour of CoCl2 paper from blue to red-pink.
. If the distillate is Ethanol, it can be burnt with a match. For ethanol,
the boiling point can also be determind (microscale method).
For
fractional distillation: Please click here