01:160:311 Lecture Notes - Lecture 4: Fractional Distillation, Paper Towel, Spatula

• School: Rutgers University
• Department: Chemistry
• Course: 01:160:311
• Professor: G Govindarajoo

Document Summary

Distillation: a way to purify liquids based on different boiling points. Wrap sides of flask and distillation head (up to level of sidearm) with foil to make process as adiabatic as possible. Want to keep this area as warm as possible so that liquid vaporizes. Want to keep sidearm as cool as possible. Wrap with paper towel to make sure vapor condenses. Position of thermometer just below the level of the sidearm. So it accurately records the temperature of the vapor distilling through sidearm. Bulb must not touch glass of apparatus. you do not want to record the temperature of glass. Position of side arm inside receiver vial to minimize release of vapors into the hood (loss of liquid) Scrape away sand from flask to cool down / pile up sand around flask to heat up using spatula. Will not get equilibrium of descending liquid and ascending vapor.