Ethyl acetate

Extraction and Recrystallization The purpose of this experiment was to separate an acid, base, and neutral component from 30 mL of ethyl acetate and 1 gram of unknown through two separatory techniques.The two separatory procedures used were extraction and recrystallization. Extraction is used because it is an important method to purify solids and remove any impurities that might have appeared when pouring chemicals or not cleaning the glassware correctly. Recrystallization was carried out in this

filtration and water. The separation of oil from the sand, KNO3, and CuSO4 mixture using ethyl acetate was performed using a vacuum filtration. Ethyl acetate is an ester of ethanol and acetic acid with a formula of CH3-COO-CH2-CH3 (Tro, 975). Ethyl acetate is a suitable solvent due to its ability to undergo hydrolysis. Hydrolysis is the breaking apart of chemical bonds with the addition of water. Both oil and ethyl acetate are nonpolar in nature, whereas sand, CuSO4 and KNO3, are polar in nature. This separation

determined. In the first of a two-step reaction, 1-phenylethanol was reacted with vinyl acetate with the help of acylase I to form an ester, unreacted 1-phenylethanol, and vinyl alcohol. The unreacted 1phenylethanol was separated from the ester by column chromatography and confirmed by thin-layer chromatography (TLC). In the second

Preparation of 3-(2-Nitrophenyl)acrylate Utilizing the Wittig Reaction Introduction: The Wittig reaction, named after Georg Wittig, produces an alkene from an aldehyde or ketone reacting with a phosphonium ylide (a Wittig reagent). The Wittig reaction is typically stereoselective, which makes the Wittig reagents more difficult to work with but use of the Wittig with different allyl substituents prove to make the Wittig more versatile which can lead to the synthesis of a wide range of alkenes, styrenes

volumes of ethyl acetate will be added to the concentrated dye extracts. The mixture will then be shaken for a few minutes and put in a separating funnel. A settled solution will have two layers in which the lower layer is the layer of interest. The layer contains mainly anthocyanins. The separation of the two layers will be done using a separating funnel. The process will be repeated until when the solution settles, the upper layer remains nearly colorless. To expel traces of ethyl acetate in the lower

second band. The reason for this method was that there had to be a change in solvent for the para product because since it is polar it was expected to run very slowly through the column and therefore needed a more polar solvent to speed it up, ethyl acetate. As expected two different yellow bands were observed. Each band represented one of the nitrophenols, with the bottom band being the ortho-nitrophenol since it is less polar and stayed within the solvent and therefore ran through the column quickly

mineral oil from the mixture, was achieved by placing the mixture into ethyl acetate. Mineral oil is the only substance in the mixture that dissolves in non-polar solvents like ethyl acetate, so this helped separate that part from the rest. To get oil by itself, the ethyl acetate must also be boiled off. Mineral oil’s boiling point is much higher than ethyl acetate’s, so it was a good solvent for this process. The remaining ethyl acetate would change states (from liquid to gas) while the mineral oil would

extraction two important techniques were used and, these are the use of the rotary evaporator and gravity filtration. Gravity filtration was used to complete a solid-liquid extraction of the nutmeg and ethyl-acetate into a round bottom flask. The rotary evaporator was utilized to evaporate the ethyl acetate in the flask and leave waxy yellowish trymristin crystals. The crystals underwent recrystallization and suction

6.4.11 Method for Determining Leachability  Toxicity Characteristic Leaching Procedure (TCLP) Reference: USEPA Method 1311 • Apparatus: 1. Agitation apparatus: The agitation apparatus must be capable of rotating the extraction vessel in an end-over-end fashion at 30 ±2 rpm. 2. Extraction vessels: Jars or bottles with sufficient capacity to hold the sample and extraction fluid. Two liter normal capacity bottles are recommended. The vessel type is determined by the analysis of interest. 3.

In the beginning of this experiment, our TA added water, salt, and 75/25 hexane/acetone to spinach leaves to a blender and blended the mixture to assume equal amounts for each group and to avoid erros if each student had to do the blending. The addition of the water to the mixture allowed the it to separate into a distinct organic layer after being run in a centrifuge, which was available to be collected at the top of the centrifuge. Salt reduces solubility, which will force the organic parts of