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Essay text:
Neutral organic compounds such as ketones can then be recovered directly from the organic layer. The principles distinguish between the organic substances (in this experiment, an acid, a diketone and an amine). The substances separated were purified by recrystallisation.
Method
Extraction ? benzimidazole
The pre-weighed starting mixture (3g) was transferred into a separating funnel (250ml); the funnel was secured uprightly in a retort ring on a stand. Solutions of diethyl ether (30ml) and dilute HCl (3M, 4ml) were added to dissolve the solids, and the pressure was equalised by removing the stopper after briefly shaking the funnel...
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