Pentyl Methanoate Lab Report

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

The balls that contained 4% polyvinyl alcohol didn’t stay in a ball like structure for more than ten to fifteen minutes. The balls that contained 4% sodium borate and polyvinyl acetate were able to bounce and retain their shape and stayed in a circular ball shape much longer than the balls that had the 4% polyvinyl alcohol. The balls were able to keep their shape because the polyvinyl acetate cross links with the sodium borate when they are reacted together. The 4% polyvinyl alcohol doesn’t cross link with the borate so the bouncy balls weren’t able to retain their shape. The bouncy balls that consisted of a two to one ratio of polyvinyl acetate and 4% sodium borate produced the best bouncy balls in this experiment. Those bouncy balls bounced the highest after there were placed in the cold and hot temperature environments. They were able to be stretched further than the other balls and retained their shape after being dropped repeatedly. A two to one ratio of polyvinyl acetate and 4% sodium borate was the ideal ratio, in this experiment, to produce a bouncy

Samples of benzophenone, malonic acid, and biphenyl were each tested with water, methyl alcohol, and hexane. Benzophenone was insoluble in water as it is nonpolar while water is highly polar. Benzophenone was soluble in methyl alcohol, dissolving in 15 seconds, because methyl alcohol is intermediately polar as benzophenone is nonpolar. Methyl alcohol is polar but not as much as water. Thus, the nonpolar benzophenone was soluble in methyl alcohol. Benzophenone was partially soluble in hexane because hexane is nonpolar as is benzophenone. Thus, benzophenone was dissolved in hexane. Malonic acid was soluble in water because both malonic acid and water are polar. It took 25 seconds for malonic acid to dissolve in water. Malonic acid was soluble in methyl alcohol because malonic acid is polar and methyl alcohol is intermediately polar, allowing malonic acid to dissolve in the methanol in 15 seconds. Malonic acid was insoluble in hexane because hexane is nonpolar while malonic acid is polar. Biphenyl was insoluble in water as water is highly polar whilst biphenyl is nonpolar. Biphenyl was partially soluble in methanol which is intermediately polar whilst biphenyl is nonpolar, allowing it to dissolve a little. Biphenyl was soluble in hexane because both biphenyl and hexane are nonpolar molecules. Biphenyl dissolved in hexane in 10 seconds.

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.

Esters have small molecular weight and most known for their pleasant aroma. Similar to the unique emission spectrum for different chemical element, different esters release a distinct

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.

The reaction took place in a conical vial and .2mL of each of the reactant samples were added to it along with some 95% ethanol. Two drops of NaOH were added shortly after and stirred at room temperature for fifteen minutes. The vial was cooled in and ice bath and crystallized. Vacuum filtration was performed to filter the crude product. The crude product was recrystallized using methanol and filtered again. We made one change to the procedure and instead of using .7mL of ethanol we

The synthesis of an ester using Fisher esterification by reacting acetic acid with an unknown alcohol was performed. Fisher esterification is a reaction that produces ester by refluxing a carboxylic acid and an alcohol in presence of an acid-catalyst. In this experiment, the carboxylic acid is acetic acid, and the alcohol is unknown. The product has a banana-like smell, which was most likely to be pentyl acetate, 2-pentyl acetate, or isopentyl acetate. The IR spectroscopy was performed on the alcohol and the product in order to confirm the synthesis of ester.

This practical report is based on the experiment of identifying the two alkanes used in the alcohols. The aim of this practical was to determine the type of alcohol A and B were by using their boiling points and the amount of carbons each alcohol had.

Dispense .5 mL water into the already weighed conical vial, replace cap and face insert on its down side.

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:

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

In this experiment, the pKa, dissociation constant, of 2-naphthol was determined by measuring the UV-visible absorption spectra of solution of the acid at different pH values.

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.