Chemistry/Distillation

SCIENCE 8 EXPERIMENT

DISTILLATION

Purpose:	To learn how to set up a distillation apparatus and separate a mixture of methanol and methylene blue dye by the method of distillation.

Material:
 * hot plate
 * U–shaped tube with rubber stopper and 125 mL erlenmeyer flask
 * 400 mL beaker and large test tube
 * stand and test tube clamp
 * solution of methylene blue dye dissolved in methanol
 * ice water

Discussion: 1.	Describe the solution at the start of the experiment.

2.	Describe (a)	the distillate (that is, the liquid which distills into the test tube), and, (b) the residue in the flask

3.	What evidence do you have that the distillation process separated the solvent and the solute?

4.	Identify the two changes of state that occurred in this experiment and describe where in the distillation apparatus each change of state occurred.

5.	What was the purpose of the ice water?