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Ethyl acetate Essays

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    decarboxylation. It is an irreversible oxidative process. Here the carboxyl group is removed from the pyruvate as a molecule of C02 and the remaining two carbons are used to become the acetyl group in the Acetyl-CoA. Therefore pyruvate C3 is converted to acetate c2. In this reaction Coenzyme A is needed. NADH is also created in this reaction. The NADH gives a hydride ion to the respiratory chain.

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    Chemistry Exploration Topic: determining the activation energy of a chemical reaction Research Question: What effect does temperature of the chemical reaction have on the activation energy ? ICT: Microsoft Word Autograph Microsoft Excel Introduction This experiment is designed to help in estimating the activation energy of the rate-limiting step in the acid catalyzed reaction of acetone with iodine. This is achieved by measuring the reaction rates at different reaction temperatures over

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    AIM Design an experiment to study a thermodynamic property of a chemical substance, a chemical reaction, a physical change or chemical phenomenon. BACKGROUND INFORMATION Standard enthalpy change of solution, ∆Hsolnø, is the enthalpy change when one mole of a substance dissolves in water to form a solution of infinite dilution under standard conditions.1 The standard enthalpy change can either be exothermic or endothermic. An exothermic reaction is a reaction where energy is released as a form of

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    Introduction: Benzopinacol can be prepared from benzophenone in presence of sun light (photochemically) using isopropanol as the reducing agent in presence of acetic acid. Acetic acid is added to prevent the cleavage of benzopinacol to benzophenone and benzhydrol by the alkali derived from the glass container used for the reaction. Benzopinacol obtained in the first experiment is converted to benzopinacolone by heating under reflux (5 minutes) with glacial acetic acid containing trace amount of iodine

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    Ceylon Cinnamon versus Cassia Cinnamon Cinnamomum verum which means “true cinnamon” is a lighter, brighter spice that is obtained from the inner bark of a tree native to Sri Lanka. Ceylon Cinnamon, as it is more commonly known as, is a milder spice as compared to the more regularly used Cassia Cinnamon. Although many countries in South-East Asia grow cinnamon, Ceylon Cinnamon is the world’s best. It’s mild, smooth aroma and taste is perfect for gourmet, desserts, smoothies, flavoring meat and basically

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    under the following conditions: the ratio of material to solvent was 10:1, undergoing ultrasonic treatment 30 minutes at 25 °C, 100 kHz /450 W.31 Before large extraction, a small-scale extraction experiments were carried out: 95% ethanol and ethyl acetate as the extractive solutions was investigated, respectively. The extraction efficiency was evaluated according to the percent content of AL and IS contained in the dried roots of Inula racemosa and calculated

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    Esters Hydrolysis Rates

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    as a function of time. The esters being compared are ethyl acetate, ethyl benzoate, ethyl formate, and ethyl butanoate while the pH level can be determined by the change in color of the solution with the use of sodium hydroxide (NaOH) for the base and the universal pH indicator. The two factors that affect the rates for the hydrolysis of esters is the steric factor and the electronic factor which will serve as the determining factor of how

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    technique to separate the acid, base, and neutral compounds. In extraction, two immiscible solvents with different polarities are used to dissolve and separate different solute components, so they form two distinct liquid layers. In this experiment, ethyl acetate, an organic solvent, and an aqueous solution, were used as the two immiscible solvents. The extraction solvent must be capable of dissolving one of the mixture components, without irreversibly reacting with it. While initially it seems as though

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    Extract Preparation 4 Disc Diffusion 5 Ethics 7 Results 8 References 9   Introduction Withania Somnifera is a plant with much potential, but is it most effective at inhibiting E-Coli and Staphylococcus aureus when in a solvent of Methanol or Ethyl acetate. This could assist in preventing and curing diseases caused by these bacteria, namely cholecystitis, bacteremia, cholangitis, urinary tract infection, and traveler 's diarrhea   Method Aseptic Technique • Ensure Methanol does not come in contact

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    The 1:1 hexane to ethyl acetate solvent resulted in the best separation because it not only showed extra spots that the other solvent mixtures did not have, but also the 4 spots were relatively dispersed with Rf values at 0.77, 0.56, 0.27, and 0.10 (Figure 2). Missing spots were

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    Distillation and IR Spectroscopy CHE 361L Christian Johnson 02/17/2018 Introduction The purpose of this lab was to separate an unknown binary mixture by distillation and use IR spectroscopy along with the placement of known functional groups in order to determine the identity of the compounds. Based upon the potential unknown solutions, there are a few specific functional groups that can specifically be targeted in order to accurately depict the identity. The functional groups and specified area

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    relative aldehyde) ,is added to the cooled mixture, then it is kept at room temperature for at least 15 minutes, followed by addition of inorganic acid solution; next, the mixture is evaporated, water is added and the mixture is extracted with ethyl acetate to isolate the product;

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    O-Vanillin Lab Report

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    The purpose of this experiment is to perform a two step reductive amination using o-vanillin with p-toluidine to synthesize an imine derivative. In this experiment, 0.386 g of o-vanillin and 0.276 g of p-toluidine were mixed into an Erlenmeyer flask. The o-vanillin turned from a green powder to orange layer as it mixed with p-toludine, which was originally a white solid. Ethanol was added as a solvent for this reaction. Sodium borohydride was added in slow portion as the reducing agent, dissolving

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    Solvent n-hexane, ethyl acetate and acetone will use to elute the column in isolation of chemical constituents of figeroots chloroform partition. The solvent system of different ratios of hexane, hexane/ethyl acetate, hexane/acetone, and acetone will use. Silica gel 60 (mesh 230-400 ASTM) will use to pack CC. In order to achieve good separation, mass ratio of silica gel to compound 20:1and 50:1 will use. 3.10.2Column Packing Before starting to pack a column, a small piece of cotton is gently will

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    Luminol Synthesis Lab

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    The chemiluminescence part of the experiment, we had to make four solutions labeled as ‘stock solution A, solution A, stock solution B, and solution B’. For the ‘stock solution A’ we put the luminol product, (0.242 g) in a 25 mL Erlenmeyer flask and dissolve it with 2 mL of 3M NaOH. Then we took 1 mL of the ‘stock solution A’ and diluted in 9 mL of water using a 50 mL beaker. Solution A. For the ‘stock solution B’ we mixed 4 mL of potassium ferricyanide solution and 4 mL of hydrogen peroxide solution

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    Tetracycline Lab Report

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    Keywords: HPTLC, Tetracyclines, residues and broiler meat, validation Introduction Tetracycline antibiotics (TCs) which are represented by oxytetracycline (OTC) and tetracycline (TC), are active against gram positive and negative bacteria antimicrobials and are commonly used in livestock and poultry for prevention and treatment of various diseases [1]. Chemical names for these antibiotics are 4-(Dimethylamino)-1,4,4a,5,5a,6,11,12a-octahydro3,5,6,10,12,12a-hexahydroxy-6-methyl-1,11-dioxo-2-naphthacenecarboxamide

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    Vacuum filtration was also used in this method to attain the product. The products in both methods were used for recrystallization and TLC. For recrystallization, boiling ethanol was used as the solvent. In the TLC procedure, 90/10 hexane and ethyl acetate was used. NMR was collected for products used in these methods. In this experiment, method 1 generate a mixture of yellowish crystals and a yellowish gluey product. Using method 2, the product appear as white crystals. Given that the yellow

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    reason for the existence of hand warmers. The experiment conducted was perused for the sole reason of saving money on these said hand warmers. If having more sodium acetate in the hand warmer lasts longer with the highest temperatures than having less sodium acetate, then one would simply buys the bigger hand warmer. After making sodium acetate, the liquid was placed into pouches, which would go on to be tested for their temperatures over a certain period of time. The pouches would be activated and placed

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    Objective: The objective of the experiment is to synthesis cis-Norbornene-5,6-endo-Dicarboxylic anhydride in a Diels-alder reaction. The chemicals used are Maleic anhydride and Cyclopentadiene. In this experiment, the melting point and of cis-Norbornene-5,6-endo-Dicarboxylic anhydride is determine. Also, the percent yield. Reaction: Equation of Reaction C5H6 + C4H2O3→C9H8O3 Physical data Structure Name Cyclopentadiene Maleic Anhydride Formula C5H6 C4H2O3 Molecular Weight 66.10g/mol 98.06g/mol

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    step, I observed that there were bubbles in the solution, especially at the bottom of the beaker. After adding the HLC, there solution had a slight yellow tint. Next, I mixed 0.529g of sodium acetate in 3mL of water and added 0.679g of acetic anhydride to the aniline solution and immediately added sodium acetate. The solution was cooled in an ice bath for fifteen minutes. During this time, I noticed the formation

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