Separatory funnel

The motivation behind this experiment was to gain insight behind the theory and practice of two laboratory techniques: solubility-dependent extraction, and recrystallization, in an effort to isolate and identify three compounds originally dissolved in a mixture. Extraction is used to isolate a specific compound. Recrystallization involves taking a crude compound and removing unwanted impurities so that a more accurate melting point can be taken, leading to a more precise identification of a…

This experiment was conducted to practice a variety of techniques in organic chemistry: separation, mechanisms, acid-base reactions, evaporation, recrystallization, and identification. The goal of this experiment was to identify the unknown mixture of two compounds. The two compounds were separated first by altering the acid components solubility through deprotonation, and then protonating the acid component again to form the separated precipitate. The ether in the neutral layer was evaporated,…

Extraction of Caffeine from Tealeaves Rosheen Villaraza, Dana Young, Dana Yu*, and Ray Zafra Department of Biological Studies, University of Santo Tomas, Manila, Philippines Abstract Experiment 3 highlights the separation of caffeine from tea leaves and using chromatography for testing its purity. Extraction is a method of separating the desired from the undesired substance in a mixture through the solubility properties of the substances. In the experimental extraction, Camellia sinensis was…

the unknown solution. The divided solution was then put into a separatory funnel, and the water part of the solution was drained. This can be done because the ethanol is a clear color and the water was yellowish. The ethanol having a lower density, floated on top of the yellow water layer, so there was a clear line where the two divided. The water layer was drained from the solution leaving just the ethanol in the separatory funnel. Using the drained water layer all of the calculations above…

using a separation funnel. An acid-base reaction proceeded and separated the solution into two layers based on their densities. The top layer contained the aqueous phase (organic acid, RCO2H) and the bottom layer contained the neutral organic phase (RZ). The (RCO2H) was acidified by the addition of hydrochloric acid. After solution had dissolved, it was then placed into a separatory funnel. Approximately 20mL of 1.0M sodium hydroxide solution was added into the separatory funnel where an acid…

sulfate, in a 250 mL round bottom flask for 5 to 10 minutes, then fit with reflux apparatus – including CaCl2 Drying Tube, 125 mL Dropping funnel, Claisen adapter, and thermometer adapter – and add anhydrous ethyl ether (40mL) through the dropping funnel. Bromobenzene (3mL) and Anhydrous Ethyl Ether (15mL) was added to the reaction flask through the dropping funnel dropwise and in halves. Reflux the reaction chamber for 30 minutes over a steam bath. Benzophenone (9.1g) was dissolved in Diethyl…

techniques were used to exploit the differences in solubility between the components. This is achieved by using a separatory funnel and three different solvents, 4M HCl which separated the caffeine, deionized water which separated the acetaminophen, and 5% wt/vol NaHCO3 which separated the aspirin. Once the solution of the crushed tablet and ethyl acetate was mixed with a solvent in the funnel two immiscible layers will form. In the case of the aspirin separation, the carboxylic component will…

experiment required the use of both solid-liquid and liquid-liquid separation in order to extract caffeine from the tea bags. The tea bad was first brewed and filtered. After brewing and filtering, the caffeine was extracted by using a separatory funnel. Through the separtory funnel, a layer of organic layer formed. This layer was the caffeine sample. In order to test the purity of the organic layer, the procedures for thin layer chromatography…

mantle for distillation to occur. It is heated until 10-ml of the mixture remains in the reaction flask or less than 100°C. The organic liquid obtained is stored in the drawer for a week. Next week, the organic distillate was transferred to a separatory funnel in order to separate the liquid. 10-ml of 3 M aqueous sodium hydroxide solution is added to the distillate. Furthermore, the mixture is shaken until two separate layers of liquids are observed. On the top was the organic layer and…

This lab was a two week long lab called the Grignard Reaction lab. The purpose of this lab was to perform the Grignard reaction and to obtain the final product triphenylmethanol from a halide, phenylmagnesium bromide and the starting material, methyl benzoate along with the Grignard reagent. Bromobenzene, magnesium turnings, and anhydrous ether were needed to form the Grignard reagent. To synthesize the reagent, react the reagent with methyl benzoate to form a tertiary alcohol. The objective of…