CHEM 351 Lecture Notes - Lecture 1: Dichloromethane, Waste Container, Pipette
2 Nov 2017
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Extraction (t 6), drying agents (t 7), filtration (t 3), rotary evaporation (t 8), recrystallisation (t 2) and/or sublimation (t 9) Avoid skin contact and avoid breathing the vapours. Add 100 ml of boiling distilled water to a large beaker and add three preweighed tea bags (note the paper of a single tea bag weighs about 0. 15 g). Allow the solution to sit for 10 minutes stirring periodically. Carefully remove the tea bags and press them spatula to obtain as much of the tea solution as possible then rinse the tea bags with some distilled water and repress them to extract as much as possible. Cool the solution by adding about 75ml of crushed ice and standing the beaker in an ice-water bath. The tea solution must be cooled to room temperature using the ice-water bath before it is used in the extraction step. Pour the cooled tea filtrate into a separatory funnel.
