The And Chemical Properties Of Artificial Acids

Ethyl ethanoate: Ethyl ethanoate is an ester. Esters are group of organic compounds which have a functional group of –COO-. Esters are liquids that become vapours quickly so they are present in perfumes.

In this part of experiment, alcohol(2ml) and CH3COOH(1ml) will react to produce an ester, the ester's odor can then be compared with that of the ester bank to determine the identity of the ester. This is done by mixing the reagents in the solution with a glass stirring rod and then to further dissolve the solution, it

9-anthraldehyde and (carbethoxymethylene)triphenylphosphorane were reacted together using the Wittig reaction to produce E-3-(9-Anthryl)-2-propenoic acid ethyl ester. .100 g of 9-anthraldehyde and .180 g of (carbethoxymethylene)triphenylphosphorane were used. 9-anthraldehyde was a green powder while (carbethoxymethylene)triphenylphosphorane was a white powder. Both were added together into a 3.00 mL conical vial with a magnetic spin valve. The vial was inserted into a 120 C sand bath to melt the reagents. Once the reagents melted, they were stirred for 15 minutes (2:30 pm-2:45 pm). After stirring, the vial was removed to cool to room temperature. 3.00 mL of hexanes were added to the vial and the suspension was stirred. The solvent was removed

Prior to high school, my uncle was my chemistry teacher. As a food scientist, he was to me a great inventor who knew everything about the magic of taste, texture, and aroma; I still remember his lecture on “good” chocolate and how cocoa butter—solid at room temperature—melts readily in our mouths. Raised on an early appreciation for the power of applied science, I am now driven toward chemical science by a desire to uncover solutions to challenges in the modern world.

In this experiment, the Fischer Esterification of an unknown acid and an unknown alcohol was used to prepare an unknown ester. Sulfuric acid was used as a catalyst in the reaction which then was put under reflux. After cooling, the pH of the solution was raised to approximately 8 using sodium carbonate. Diethyl ether was added, then the aqueous layer was removed and the organic layer was washed with sodium chloride. The aqueous layer was removed again and sodium sulfate was added. The unknown product was then identified using gas chromatography (GC) to obtain the retention time.

This reaction is spontaneous for almost all esters but can be very slow under typical conditions of temperature and pressure. The reaction occurs at a much faster rate if there is a significant amount of base (OH-) in the solution. In this lab experiment, the rate of this reaction will be studied using an ester called para-nitrophenyl acetate (PNA), which produces an alcohol,

This experiment was designed by conducting a substitution reaction to construct a complex compound (2-methylphenoxyacetic acid) from two simple parts; also known as synthesis - converting simple molecules into more complex molecules. A purification technique known as crystallization was used to purify the product. Suction filtration was used to filter out the product. The experiment was completed over a three-day experimental period.

To prepare and purify an ester: 1-pentyl ethanoate, using pent-1-ol and ethanoic acid. An annotated reaction showing this reaction is shown below:

Purpose: The purpose of the experiment was to perform the acid-catalyzed Fischer Esterification of acetic acid and isopentyl alcohol to form isopentyl acetate, or banana oil, which is used in flavor industries. The equilibrium of the reaction was changed by adding an excess amount of acetic acid. The reaction was refluxed and product was purified by extraction and distillation. Isopentyl acetate was analyzed by infrared spectroscopy and 1H NMR spectroscopy.

An ester was synthesized during an organic reaction and identified by IR spectroscopy and boiling point. Acetic acid was added to 4-methyl-2-pentanol, which was catalyzed by sulfuric acid. This produced the desired ester and water. After the ester was isolated a percent yield of 55.1% was calculated from the 0.872 g of ester recovered. This quantitative error was most likely due to product getting stuck in the apparatus. The boiling point of the ester was 143° C, only one degree off from the theoretical boiling point of the ester 1,3-dimethylbutyl, 144 ° C. The values of the

The intermolecular Van Der Waals forces that esters have are very weak. Due to the weak intermolecular forces that methyl propionate has it has a low boiling point of 80°C, this is when it reache the gas phase. Not only do esters have weak intermolecular forces, they are also volatile. Since they enter the gas stage easily and evaporate easily the smell can easily reach the human nose. The receptors in the human nose then send a nerve impulse to the brain, where it is processed.

In this experiment, a Fischer Esterification reaction was performed with two unknown compounds. The unknown compounds, Acid 2 and Alcohol D, were identified by using the knowledge of the reaction that took place, and the identity of the product that was synthesized. The identification of the product resulted from analysis of IR and NMR spectra.

The purpose of this lab was to synthesize the ester isopentyl acetate via an acid catalyzed esterification (Fischer Esterification) of acetic acid with isopentyl alcohol. Emil Fischer and Arthur Speier were the pioneers of this reaction referred to as Fischer Esterification. The reaction is characterized by the combining of an alcohol and an acid (with an acid catalyst) to yield and ester plus water. In order to accomplish the reaction, the reactants were

The use of beta amino acids to replace the naturally occurring alpha equivalent has recently allowed scientist to explore a more stable peptide mimic. The ability of beta-peptides to resist protease degradation has vastly improved their ability to be drug candidates as well as other therapeutic targets. As a result, it will be explored in this paper whether or not peptide mimics with beta peptide backbones are able to function as transporting polymers for short interfering RNA (siRNA). siRNA has the ability to silence any gene, and has already been shown to eliminate targets in many liver diseases, including hepatitis B. The challenge in using siRNA is that not membrane permeable because it is large and negatively charged. In order to harness the therapeutic benefits of siRNA, a molecule to transport siRNA into the cell must be found. Arrowhead Chemicals in Madison, WI has shown progress in synthesizing various peptides and polymers to tackle this problem. However, the need for a more efficient and selective carrier is still crucial. In collaboration with Arrowhead Chemicals, this research seeks to test oligomers with a beta peptide backbone for their efficiency in transporting siRNA into a hepatocyte cell.

Stomach acids are essential for the digestion of food. Increased secretion of acids in the stomach gives rise to acidity. Acidity is manifested by several uncomfortable symptoms such as burning and pain in the chest and stomach; nausea; bitter taste in mouth; vomiting and discomfort in the stomach. Acidity, been one of the commonest digestive complaints. At some point in our lives, we have all suffered from these symptoms. Acidity is generally stimulated by consumption of spicy foods, junk food, carbonated drinks, fried foods, chocolates, stress or lack of sleep. Obesity, pregnancy and other medical conditions may also give rise to acidity. Irrespective of the reason, acidity can prove to be an uncomfortable experience.