Schlenk Tube

Introduction:

A Schlenk tube is a reaction vessel typically usedd in air sensitive chemistry. It was an invention of Wilhelm Schlenk. These tubes are made of borosilicate glass such as Pyrex.
There a several types of Schlenk tubes;

• Schlenk flasks are round bottomed
• Schlenk tubes are elongated 

Schlenk tubes are used to work out the pressure of gases. Also by connecting the Schlenk tube to Schlenk Schlenk lines we can fill and evacuate the tube or flask with gases like nitrogen or argon.

Method step by step:

1. Make the rubber band double (fold it)
2. Put it through the bottom and stretch
3. Pass the rubber band throught the top
4. Twist the rubber band before repeating the last step. Repeat the last step.
5. Repeat step 4.
6. After having put the rubber band through the top of the Schlenk tube, stretch and pass it to the bottom of the tube. (the fianl result should look simetrical)