Also, while the solution is being vaporized and cooled it is being refluxed. This “allows for an
Also, while the solution is being vaporized and cooled it is being refluxed. This “allows for an
To prepare isopentyl acetate (banana oil), an ester, from isopentyl alcohol and acetic acid through the Fischer Esterification reaction.…
After the product has been synthesized, it will be tested using a gas chromatograph to measure the percentages of different compounds in the product. This measurement will tell us if the product that we have synthesized could be used as an effective substitute to natural banana extract.…
Extraction. The operations in this paragraph should be done as rapidly as possiblebecause the t-pentyl chloride is unstable in water and sodium bicarbonate solution. It is easily hydrolyzed back to the alcohol. In each of the following steps, the organic layer should be on top; however, you should add a few drops of water to make sure. Wash (swirl and shake) the organic layer with 10 mL of water. Separate the layers and discard the aqueous phase after making certain that the proper layer has been saved. Add a 10-mL portion of 5% aqueous sodium bicarbonate to the separatory funnel. Gently swirl the funnel (unstoppered) until the contents are thoroughly mixed. Stopper the funnel and carefully invert it. Release the excess pressure through the stopcock. Gently shake the separatory funnel, with frequent release of pressure. Following this, vigorously shake the…
In this experiment we also used a chemical method known as extraction. This process of separation is used when only one component of the mixture is soluble in a specific solvent. In our case we had to use hydrochloric acid (HCl).Extractions, is a way to separate a desired substance when it is mixed with others. The mixture is brought into contact with a solvent in which the substance of interest is soluble, but the other substances present are insoluble. And below is a…
The purpose of this lab, to form various esters by combining various carboxylic acids and alcohols, was successful. The process of esterification are when a carboxylic acid reacts with an alcohol and produces an ester, or an organic compound, and water. Esters produce a certain scent which is usually fruity. In the first reaction, glacial acetic acid, or ethanoic acid, reacted with isoamyl alcohol and produced isoamyl ethanoate and water. The resulting ester scent was banana.…
The technique for esterification that was employed in the experiment was to use a reflux apparatus (Figure 1) while heating in order to evaporate out water to drive our reaction into the product favored direction. The starting material of isopentyl alcohol (1.0 mL) and excess glacial acetic acid(1.5 mL, 17.6M) were eppendorf pipetted into a 5 mL conical vile. This mixture was acid catalyzed by the addition on two drops of H2SO4. The mixture was then heated to 150-160⁰C in order to increase energy for esterification to occur over a period of 60- 75 minutes.…
In this lab the synthesis, purification, and characterization of isoamyl acetate, or banana oil, was determined. The synthesis was completed by a reversible esterification reaction which required the heating of glacial acetic acid and isoamyl alcohol, combined with a sulfuric acid catalyst in hexane. In order to increase the efficiency of the reaction, LeChatelier’s Principle is utilized by removing water from the products. As a result, the reaction as a whole shifts the left producing more isoamyl acetate to try and balance the reaction once again. Once the product was collected, it was purified through means of fractional distillation. Finally to characterize the product, and assess its purity, IR and NMR spectroscopy were taken.…
This experiment combined all the knowledge of the previous labs performed throughout the semester. An unknown mixture containing an organic acid or base and an organic neutral compound in nearly equal amounts needs to be separated to its separate components. An understanding of solubility, extraction, crystallization and vacuum filtration is necessary in order to successfully carry out the separation.…
For both of the organic acid and organic base extraction, the addition of the respective inorganic acid or inorganic base (HCl or NaOH) to the three-component mixture caused an immiscible appearance of the solution in the separatory funnel. By briskly shaking the separatory funnel with the mixed components created a build up of pressure which was released through the stopcock forming small disappearing bubbles within the tip of the separatory funnel. Once the funnel was placed back into the iron ring and the stopper was removed, the distinct upper ether layer had an oily appearance and a visible barrier separating it from the lower water-organic base or organic acid layer. After pouring out the ether layer into a beaker and adding anhydrous sodium sulfate, all that remained in the funnel was the neutral extract.…
The purpose of this experiment was to produce isopentyl acetate, banana oil. Acetic acid and isoamyl alcohol were used to synthesize isopentyl acetate. The techniques used for the separation and purification of isopentyl acetate were reflux, liquid-liquid extraction, neutralization and distillation. The identification of isopentyl acetate was based on boiling points and an infrared spectrum. This experiment resulted in a 11.68% yield. The reactants and products of this reaction are in equilibrium, and therefore it was difficult to obtain a 100% yield.…
Carboxylic acids contain the functional group –COOH whereas in ester’s the hydrogen is replaced with an R denoting any alkyl or aryl group; -RCOOR’. Esters with low-molecular weights are commonly used as components in the flavor’s and odors of many fruits & fragrances’ as well as to enhance foods & beverages. A food technologist may utilize an ester or many esters to produce characteristic fragrances & flavors in foods (Table 1).…
Extraction involves dissolving a compound or compounds either from a solid into a solvent or from a solution into another solvent. Extraction is a method used to purify a substance by removing the impurities that was added to it. A solvent- solvent extraction is a type of extraction that is most commonly done by using two substances that are typically insoluble with each other. An acid-base extraction is a solvent-solvent extraction, in almost every case one of the solvents is water or an aqueous solution and a requirement of a solvent-solvent extraction is that the mixture of the two solvents will separate into two layers. The upper layer is that which is less dense, while the lower layer is the denser of the two. The organic solvent must also be volatile so it can be easily removed by evaporation at the end. Extractions are extremely useful for isolating and purifying amines, carboxylic acids, phenols as well as some neutral compounds. All three of these functional groups can be interconverted from non-ionic organic-soluble forms to water-soluble ionic forms by changing the pH levels. In the experiment done in this lab, a mixture of and a neutral compound and either an acid or base impurity will be separated by an acid-base extraction. The unknown compound will then be purified by recrystallization and identified by melting points.…
The banana peelings were collected after the consumption of its flesh. The peelings were then finely chopped and macerated. The peelings were left to ferment for about 5-7 days. There were two treatments used in this study. T1 is made up of extracted juice from the macerated peelings and T2 is made up of juice with pulps. After seven days, the percent yield was determined for both treatments. The distillate was lit to show that there really is alcohol in the product.…
This study is done to give importance to banana peeling. The research wanted to produce Ethanol Fuel out of Banana Peelings. Since Banana is abundant here in are municipality there will be a high number of peelings. The researchers wanted to know the effectivity of the banana peelings as Ethanol fuel.…
Distillation is the process heating a liquid until it boils, then condensing and collecting the resultant hot vapors. Distillation is used to purify a compound by separating it from a non-volatile or less-volatile material and it is a commonly used method for purifying and separating mixtures of liquids into their individual components. As the mixture is heated, the temperature rises until it reaches the temperature of the lowest boiling substance in the mixture, while the other components of the mixture remain in their original phase in the mixture. The resultant hot vapor passes into a condenser and is converted to the liquid, which is then collected in a receiver flask. The other components of the mixture remain in their original phase until the most volatile substance has all boiled off. Only then does the temperature of the gas phase rises again until it reaches the boiling point of a second component in the mixture.…