1) Circle the following laboratory techniques that are used for purification.

Precipitation                                       Reflux

Gas Chromatography                        Rotary Evaporation

Liquid-Liquid Extraction                     Distillation

IR Spectroscopy                                Mixed Melting Point

           Recrystallization                                 Vacuum Filtration

                       Thin Layer Chromatography             Gravity Filtration

pur-new-sol