Experiment 2: Simple and fractional distillation of dichloromethane and Ethanol
Part I: Simple distillation apparatus set up
1. To the 100 mL round-bottomed flask, add 10.0 mL of dry dichloromethane (measure in fume hood, using a small graduated cylinder), 10.0 mL of dry ethanol (fume hood), and a couple of boiling chips. Clamp the neck of the flask securely to a ring stand.
2. To the 3-way distilling head, attach the thermometer adaptor and thermometer and follow by to combine with step 1 .
3. To a condenser link the water tap.
4. Combine steps 2 and 3 and follow by to a receiving, joint the condenser.
5. Set up the Bunsen burner and start to distillate the mixture.
6. Record the first temperature, when the first drop is came out. Continue to record the volume and temperature every 20 second until the volume is up to 15 cm-3.
7. On the same graph, plot the temperature vs volume of distillate (distillation curve) for both the simple and fractional distillation.
Note that boiling points of dichloromethane and ethanol are 39.8 and 78.5, respectively.