48672903-Chem-31-Experiment-No-1

The solid liquid extraction extracted soluble

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Unformatted text preview: he solid-liquid extraction extracted soluble components such as caffeine from tea with water as the solvent. In the liquid-liquid extraction, chloroform was used to dissolve caffeine and to separate it from water. Chloroform and caffeine are then subjected to distillation for separation due to the difference on their boiling points. Since chloroform has lower boiling point, it evaporated faster. The remaining liquid was then heated evaporating the chloroform and leaving the caffeine crystals. Out of 20 g of Tea, only of caffeine was obtained. The small amount of caffeine crystals that are obtained are due to some errors occurred during the experiment. It may be personal or instrumental errors. Our personal errors includeletting the solution evaporate and carelessness in handling chemicals that we spilled some of the chemicals. In order to prevent or minimize these errors, it is recommended that the experimenters must do the procedures carefully and systematically. Always remember that proper handling of chemicals, proper weighing of samples and proper ways to transfer liquids to another container. V. QUESTIONS A. Discuss briefly the role of the following in the isolation of caffeine: 1. Sod...
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