Extraction of benzoic acid and naphthalene lab report. (DOC) Extraction of Benzoic Acid and Naphthalene in Mixture 2022-10-03
Extraction of benzoic acid and naphthalene lab report Rating:
The extraction of benzoic acid and naphthalene is a common laboratory procedure that involves the separation of these two compounds from a mixture. Benzoic acid is a commonly used food preservative, while naphthalene is a fragrant organic compound that is used in the production of a variety of products, including mothballs. In this lab report, we will describe the steps involved in the extraction of benzoic acid and naphthalene, as well as the results of the extraction.
The first step in the extraction of benzoic acid and naphthalene is the preparation of the sample. A mixture of benzoic acid and naphthalene is prepared by dissolving a known amount of each compound in a solvent, such as dichloromethane or hexane. The mixture is then filtered to remove any impurities or contaminants.
Next, the extraction of the compounds from the mixture is performed. This is typically done using a separation funnel, which allows the mixture to be separated into two layers: an organic layer containing the benzoic acid and naphthalene, and an aqueous layer containing any water-soluble impurities. The organic layer is collected and the aqueous layer is discarded.
The organic layer is then washed with aqueous sodium hydroxide solution to remove any remaining impurities. The benzoic acid and naphthalene are then separated from each other by adding a small amount of a polar solvent, such as ethanol, to the mixture. The polar solvent selectively dissolves the benzoic acid, leaving the naphthalene in the organic layer.
The benzoic acid can then be recovered from the polar solvent by evaporating the solvent under reduced pressure, leaving a solid residue of pure benzoic acid. The naphthalene can be recovered from the organic layer by evaporating the solvent under reduced pressure, leaving a solid residue of pure naphthalene.
In our extraction of benzoic acid and naphthalene, we were able to successfully separate the two compounds and obtain pure samples of each. The yield of benzoic acid and naphthalene was determined by weighing the pure samples and comparing them to the starting amounts of the compounds in the mixture. Our results showed that we were able to recover over 90% of both benzoic acid and naphthalene from the mixture, indicating that the extraction was successful.
In conclusion, the extraction of benzoic acid and naphthalene is a straightforward laboratory procedure that involves the separation of the compounds from a mixture using a separation funnel and the selective solubility of the compounds in different solvents. Our results demonstrate that it is possible to recover high yields of both benzoic acid and naphthalene from a mixture using this method.
Extraction of Benzoic Acid Lab Report
. Next, 3M of HCl were added drop wise to the solution until it reached a pH of 2, thus introducing the hydronium ion. The centrifuge tube will then be vented by loosening the cap, and then it will be clamped to allow the two phases to separate. What two chemicals are in the mixtures you will be given to separate this week? EXTRACT GENTLE shake REMOVE LOWER aqueous layer shake! Example: The solubility of liquid diethyl ether in liquid water and vica versa , is small, neither are very soluble in the other, these two liquids are immiscible. The nature of the contents will be determined by the practicability of the methods in undergraduate teaching, by their acceptability for research publications, and by their affordability by public sector institutions. The % recovered based on the mass of the teabags as a whole was 1.
Naphthalene is flammable, toxic, and its vapors can cause nausea. A rotary evaporator was used to pull off the ether. This combination will result in the formation of two immiscible solution, due to the different density of both solutions. In addition, one of the groups was kind enough to share the measurement they got, which is what I used to get my calculations. Extraction Post-Lab Assignment 20 pts.
Separating through extraction is done by using the variable solubilities within many different solutes within solvents. A completed version of the Table below. Some chemical reactions transform neutral compounds into ions, while others neutralize ions. The aqueous sodium hydroxide extract containing the 2-naphthol was acidified as described above, except the extract was chilled in an ice bath both prior and during the acidification process to prevent the 2-naphtol from turning to an oil. Chemical reactions alter the solubility of substances in water. Also discuss and changes to the plan.
The mass doesn't have to be exactly 150 mg but be sure to record exactly how much YOU weighed. Most lab injuries are caused by cross contamination with your gloves or splashes when transferring solvents. Any lab report submitted after the due date of TUESDAY, SEPTEMBER 28th within 24 hours after the due date and time will be subjected to a 25% point deduction on the earned score. The ether solution containing the naphthalene was decanted into a pre-weighed, 100mL, round-bottom flask. These two solutions did not mix due to differences in polarity, making it possible to separate the two through the funnel.
Extraction of benzoic acid lab childhealthpolicy.vumc.org
The file size should be less than 10 MB. Sample Weight g 0. Evaporate the solvent 1 pts. After extraction of the benzoic acid into the aqueous solution as its anionic salt, the ether solution was then washed with water two further times. To confirm the purity of the recrystallized naphthalene and benzoic acid, a thin layer chromatography TLC experiment was performed comparing the two pure compounds to the original mixture of the two. Did a precipitate form? Whereas, benzoic acid, is soluble in aqueous solution and insoluble in ether.
Your handwriting should be neat and legible. A precipitate, p-nitroaniline, formed which was also filtered via vacuum filtration. TWO-BASE EXTRACTION OF BENZOIC ACID, 2-NAPHTHOL, AND NAPHTHALENE FROM UNKNOWN SAMPLE 131 Douglas G. Once this had been conducted, the 6M of NaOH was added to the organic solution, trying to prove that it would still be insoluble in a water and NaOH solution. Sodium sulfate is a simple inorganic ionic solid that will absorb any water in the ether because the water is "attracted" to the ionic solid due to the strong ion-dipole interactions. The main goal this experiment was to succeed an acid-base reaction which helps to take out the benzoic acid during changes in solubility. REPORT FOR EXPERIMENT 6: EXTRACTION OF BENZOIC ACID ABSTRACT: The purpose of this experiment was to learn the techniques of the extraction and separation process and to determine the overall mass transfer coefficient of benzoic acid from a mixture solution of benzoic acid and toluene.
SOLUTION: ASU Extraction and Purification of Naphthalene and Benzoic Acid Lab Report
The residue on the filter is the purified benzoic acid. Make sure the machine is cooling down before you walk away from the machine. O sodium sulfate Na O S Na O O 10. Considering this, gloves and goggles should be worn when handling since the toxins can burn human skin. Very little pressure built up during the venting process. The percent recovery for benzoic acid was 91. All figures and structure must be properly labeled and described directly under the figure.
(DOC) Extraction of Benzoic Acid and Naphthalene in Mixture
Based on the melting point behavior you observed for your isolated benzoic acid, do you think that is fairly pure, and how do you decide that? The % recovery based on the 2% mass assumption was 59. The major reaction mechanisms are shown below:… Measuring the Melting Points of Compounds and Mixtures This exercise dealt with the melting points of pure mandelic acid and benzoic acid. The purer the sample, the narrower the melting point range. Be sure to make sure that neither of these come into contact with your skin since both are potentially corrosive and irritants and can permeate the skin. It is allowed to directly quote a small portion of a reference, as long as you correctly use quotation marks. Purpose The purpose of this experiment is to separate and form purified sample of benzoic acid and naphthalene.