psy105

Drying the organic solvent. The organic solvent containing the neutral compound contains some dissolved water. If the solvent were evaporated at this point, the resulting solid neutral compound would be wet with water and would consequently be a gooey mess and would take a long time to dry. A drying procedure is therefore necessary to remove all traces of water before the solvent is evaporated. This procedure consists of two steps: (1) thoroughly mixing the solution with saturated aqueous sodium chloride (saturated salt solution) and discarding the aqueous layer (this is a preliminary drying step that removes most of the water) and (2), adding a solid inorganic drying agent (this strongly binds to the remaining traces of water dissolved in the organic solvent), allowing it to remain in contact with the solution for several minutes, then separating the solution from the solid drying agent. The solvent can then be removed by evaporation, leaving behind the solid neutral compound.
Very often in the synthesis of a compound or in the isolation of a compound from a natural source, acid-base extractions are used to either directly isolate a desired acidic or basic compound or to remove acidic or basic impurities. Extraction, along with recrystallization and distillation, is one of the most important separation and purification techniques in organic chemistry.
The Experiment.

then the drop will mix with the solution. If the solvent is the mistaken organic layer, then the water drop will create a second layer. In general, this method can help determine the identity of the layer.
However, it is still best to keep ALL the layers until the extraction is complete and your product has been isolated.

Separating the Layers
Once the two layers are mixed, you will need to separate them. You could separate the two layers by pouring off the less dense layer into a separate container. You would find that it is difficult to do this