Place a funnel on the top of the buret and slowly add 5g of dry alumina. When all of the alumina has been added, rinse the inside of the buret with additional petroleum ether to flush down any alumina that may be stuck to the sides. Add another 1-cm layer of dry clean sand on top of the alumina. Drain the solvent from the column until the solvent is at a level just above the top of the sand. The column is now ready for the addition of the mixture to be separated.
With only a swift small movement side to side the detergent completely dissolved into the alcohol creating a discolored substance. The oil added to this mixture later on simply went straight to the bottom. Water/ Detergent: Sinks to bottom as well. When shaken the detergent it completely dissolved but unlike the alcohol this mixture creates suds and a muggy discoloration to the water. The oil later added simply stayed in the middle between the liquid and the suds at the top.
Go to the stockroom and obtain a glass-stoppered flask, which will serve as a pycnometer, and samples of an unknown liquid and an unknown metal. When measuring the density of a liquid make sure that your flask is clean and dry. Weigh the dry flask with its stopper on the analytical balance, or the top-loading balance if so directed, to the nearest milligram. Fill the flask with distilled water until the liquid level is nearly to the top of the ground surface in the neck. Put the stopper in the flask in order to drive out all the air and any excess water.
The samples don’t have to have the same mass as long as it’s between 0.3 and 0.4g. Add about 20mL of water and 3 drops of phenolphthalein indicator to each sample and allow the solid to dissolve. Prepare a 50mL buret for use by washing it, rinsing it with tap water, and rinsing it twice with distilled water. Finally rinse it twice with 5mL portions of your sodium hydroxide solution. Mount the buret on the ringstand and fill it above the zero mark with the prepared sodium hydroxide solution.
Steam is introduced to the distillation system. Therefore the boiling point of the compound is depressed and allows it to evaporate at lower temperature before the compound becomes inappreciable. The retention got for this lab was 0.216 for the solvent and the limonene is 1.000. To extract the solvent, dichloromethane was added and the aqueous mixture was extracted. Then, magnesium sulfate was added as a drying agent to remove
Therefore, acetic acid was used for this experiment. It reacted with the sodium hypochlorite to give hypochlorous acid, which thenreacted with the oxygen of the alcohol. Steam distillation was used to isolated product, and then was extracted into the distillate with ether with the addition of dying agent calcium chloride. Finally, the ether was removed to get the product, cyclohexanone with the "salting out" process. The process of salting out was used to separate cyclohexanone from the aqueous solution to purify the product.
Radu Purtuc | Chemistry 231 - Lab | Section 32 Ronnie :: team-member TECH 705, SEPARATING ACIDS AND NEUTRAL COMPOUNDS BY SOLVENT EXTRACTION - MACROSCALE EXTRACTION July 6, 2006 Lab Report INTRODUCTION Purpose: using extraction technique to separate acetanilide, p-toluic acid, and p-tert-butylphenol; then measure the melting points of each compound and comparing them to the statistical values. Background: separating acids and neutral compounds by solvent extraction is a useful technique used in practice by chemists to separate organic compounds from mixture of other compounds. It generally involve several steps, with limiting factors being the number and output purity of compounds to be extracted from source mixture. A number of specific compound solvents not inter-miscible are used to separate and dissolve compounds, and a physical transfer between solvents is employed. An example of use is cleaning compounds of impurities, where different solvents work as a molecular filter that interacts differentially with compound and impurities respectively.
The solution was decanted into another beaker. The left over sand was rinsed with few mille liters of hot distal water three times to remove any leftover benzoic acid and salt. The sand was allowed to completely dry and the
Samantha Monette Lab Section E Wednesday 10:00-12:50 p.m. Bromination/Debromination of Cholesterol Abstract: The purpose of this experiment was to purify commercial cholesterol. The commercial cholesterol was brominated using bromine as the reagent. After the compound was cooled and vacuum filtrated, dibromocholesterol was obtained. To purify the dibromocholesterol, zinc was added as the reagent. After a series of washes to remove any impurities, the compound was dried and decanted, cholesterol was synthesized.
ABSTRACT Isopropyltoluene isomers were synthesized through the friedel-crafts alkylation of toluene with 2-chloropropane in the presence of aluminum chloride as a catalyst. Through extraction of the distillate with water and 5% NaHCO3, followed by a fractional vacuum distillation, the desired aromatic organic compound was isolated. Infrared Spectroscopy and Gas Chromatography were used to analyze the composition, purity and to confirm the identity of the prepared product. The sample weighed approximately 2.66g, which reflected a low yield at 47%. However, from the GC the area % (also known as percent purity) was 91.8%, which indicates that a very pure product was obtained.