文档介绍：Extraction
1. The purpose of the experiment required.
Principles and methods of learning Extraction and purification of compounds.
Master the use of separatory funnel, understand the principles of solvent extraction choice.
2. Experimental principle.
The solubility of the organic substance in the organic solvent is generally higher than the solubility in water. So ,they can be extracted from water.
At a certain temperature, the distribution of a substance between two immiscible solvent ratio is a constant.（CA/CB=K）
With the same solvent to extraction with a small amount of times, the extraction efficiency is higher than once.
3 Laboratory instruments and reagents.
Laboratory instruments: separatory funnel,Erlenmeyer flask,Beaker,Beaker,Furnace, Graduated cylinder,Distillation flask,Distillation head,Straight condenser, Adapter,Lift,Hose,Formwork units,Wire-gauze,Thermometer.
Reagents:5%Aqueous solution of phenol,Ethyl acetate,2%Aqueous solution of ferric chloride,Anhydrous magnesium chloride.
4 Instrument
Extraction Distill
5 Experimental procedure and phenomena
Added 20 ml of aqueous solution of phenol and 10 ml of ethyl acetate in a separatory and deflated, repeat 2-3 for some solution was divided into two the organ