Unit 6.3 Simple Distillation Assembling a Simple Distillation Apparatus JOINT CLIPS: the Use of Joint Clips Increases the Safety of This Investigation

Home , Liebig condenser, Retort

Unit 6.3 Simple Distillation Assembling a simple distillation apparatus JOINT CLIPS: The use of joint clips increases the safety of this investigation. They should be THERMOMETER: The screw-cap of the thermometer used at the following joints: adaptor should be loosened slightly and the thermometer 1. pear-shape flask and still threaded gently through the cap. The bulb of the head thermometer should be just below the turn in the still- head so that it is measuring the vapour correctly. 2. still-head and Liebig condenser 3. Liebig condenser and receiver adaptor

If joint clips are not available, Thermometer the receiver adaptor should not be used as it is liable to fall and The clamp of one retort break. stand should be attached to the centre of the Liebig A very small amount of Vaseline condenser and twisted can be used to give a better to match the angle of the seal at the other two joints, by Thermometer still-head. smearing some on the inside of adaptor the receiving side of each joint.

Liebig condenser Still-head

Receiver adaptor

Pear-shaped flask

Water hose to sink Wire gauze

Tripod

Bunsen Water hose from tap feeding burner cold water to bottom of Liebig condenser

The clamp of one retort stand should be attached to the neck of the pear-shaped flask, RECEIVER ADAPTOR: Should be attached to the to hold it over the tripod safely. end of the Liebig condenser using a joint clip. A small beaker should be placed underneath to collect the distillate.