Essay Separation of Benzoic Acid and Acetanilide

There are various techniques to separate a mixture of compounds from each other. One of the commonly used way to isolate compounds from a mixture of two compounds is called extraction. This method of extracting two compounds from each other relies on the different solubility of the compounds in two different solvents.

Experiment 55 consists of devising a separation and purification scheme for a three component mixture. The overall objective is to isolate in pure form two of the three compounds. This was done using extraction, solubility, crystallization and vacuum filtration. The experiment was carried out two times, both of which were successful.

In this lab, liquid-liquid extraction was performed to isolate a mixture of benzocaine and benzoic acid. 2.0107 grams of the mixture was first weighed out for the trials. When HCl was added to the mixture for the first acid extraction of benzocaine, an emulsion formed during inversion and venting that prevented a defined separation of the two layers. 8 mL of water was therefore added before continuing the extraction. The addition of NaOH then turned the top aqueous layer basic, indicated by the pH strips that turned blue when tested. A vacuum filtration isolated 0.29 grams of benzocaine and a MelTemp apparatus measured the crystal’s melting point ranges to be 85.1C-87.4C. For the base extraction of benzoic acid, the aqueous layers were retrieved

There are millions of different organic compounds. Most of them are found in mixtures and in order to achieve a pure form they need to be separated, isolated, and purified. However, there are endless numbers of possible mixtures, which make it impossible to have a pre-designed procedure for every mixture. So chemists often have to make their own procedures. The purpose of this experiment was to prepare the student to the real world by them designing their own procedure which will help them understand the techniques of separation and purification better. The goal was to extract two of the components of the

Sodium bicarbonate has a molar mass of 84.0 g/mol. It has a melting point of 50°C and can be an irritant.

The purpose of this experiment is to practice common organic laboratory techniques inside the lab to get one oriented to the basic methods of procedure that can be used for later experiments. This experiment involves the separation of benzoic acid from a more crude form, consisting of benzoic acid, methyl orange, a common acid/base indicator, and cellulose, a natural polymer of glucose (Huston, and Liu 17-24). The technique that is used to perform this separation is called extraction. Extraction is a systematic process of separating mixtures of compounds, taking advantage of the affinity differences of compounds to separate them (Padias 128-37). This technique recognizes the principle that “like dissolves in like,” that is,

The first objective is to study the effect of food processing on molecular structure of processed food. This objective will be achieved through applying detailed molecular structure characterization studies on food processed under different processing parameters. This objective is aiming fundamental knowledge on processing effect on food structure with relating food structure to their functionality.

With a 9-inch pipet was used to add water through the condenser to keep the flask no more than half way full. Clove oil was extracted from the distillate in 1 mL increments every 5 to 10 minutes. The distillation and extraction process was approximately 37 minutes with 7 mL of distillate recovered. The product recovered was a light yellow liquid color with the same strong, sweet, cinnamon odor as the raw clove. 1 mL of dichloromethane solution was used to rinse the Hickman still and was then transferred to the centrifuge tube. Another 2 mL more of dichloromethane was added and shaken vigorously. Upon shaking the the mixture turned a cloudy white color with two layers resulting. The major component of clove oil was extracted with two more 3 mL portions of dichloromethane solution. The mixture was allowed to cool and left in the hood overnight to dry.

Objective: The objective of this experiment is to use acid-base extraction techniques to separate a mixture of organic compounds based on acidity and/or basicity. After the three compounds are separated we will recover them into their salt forms and then purify them by recrystallization and identify them by their melting points.

Name CHE 173 Sec # January 25, 2005 Experiment 36: Determination of the Structure of a Natural Product in Anise Oil

In 2000, the US Food and Drug Administration issued a health claim which states that consuming foods containing plant sterol and stanol esters along with other low cholesterol and saturated fat foods can reduce the risk of coronary heart disease (Jones, Vanstone, Raeini-Sarjaz, & St-Onge, 2003). Today, many functional foods in the form of margarines, spread, yogurt, and others, have been enriched with phytosterols and advocated as being able to reduce the risk of coronary heart disease. Phytosterols have been known for its cholesterol-lowering effect by blocking absorption of cholesterol in the intestines. However, there are controversies surrounding the efficacy of phytosetrol that are enriched in foods in reducing cholesterol levels. Many studies have also demonstrated the efficacy of phytosterol-enriched foods. Vásquez-Trespalacios and Romero-Palacio (2014) and Amundsen, Ose, Nenseter, and Ntanios (2002) have demonstrated the efficacy of phytosterol-enriched foods in reducing total and LDL-cholesterol levels. However, there are also many studies that show otherwise. For example, Jones et al. (2003) and Weingärtner et al. (2016) have shown that phytosterol-supplemented foods did not have any effect on total and LDL-cholesterol levels. The debate regarding the efficacy of phytosterol in functional foods is crucial as phytosterol-enriched foods can potentially be a solution to a continuous increase in population suffering from cardiovascular diseases. The

3.) Combine the ground cloves with 50ml of water in the boiling flask then; steam distill the mixture to obtain the clove oil. Continue the distillation until a drop or two of the emerging distillate, collected on a watch glass, is odorless and water-clear; with no oily droplets. 150ml might need to be distilled before it becomes clear. Vent the steam line or raise the steam inlet tube above the liquid level in the boiling flask before you turn off the steam. Took about 20-30 minutes for emerging distillate to drop on watchglass and first few drops seemed clear. But we went ahead and placed a flask and started collected liquid because the process of distilling 150ml of fluid was taking quite some time. A sufficient amount of fluid was collected and checked by Professor.

The objective of Part 1 of this experimental procedure includes the isolation of a pure trimyristin from the mixture of compounds in nutmeg. The objective of Part 2 of this experimental procedure includes synthesizing myristic acid from the previously produced and collected trimyristin by hydrolysis. The myristic acid in its crude form will be recrystallized for purity. All products and compounds will then be tested for purity by taking their melting points.

Abstract: This procedure demonstrates the nitration of methyl benzoate to prepare methyl m-nitrobenzoate. Methyl benzoate was treated with concentrated Nitric and Sulfuric acid to yield methyl m-nitrobenzoate. The product was then isolated and recrystallized using methanol. This reaction is an example of an electrophilic aromatic substitution reaction, in which the nitro group replaces a proton of the aromatic ring. Following recrystallization, melting point and infrared were used to identify and characterize the product of the reaction.

Distillation is a technique used for separating, identifying and purifying liquids. Simple Distillation and fractional distillation are often used for isolation of mixture of liquids. In this experiment, steam distillation is used to separate carvone from caraway seeds and spearmint leaves. For steam distillation, the bp has to be less than 100° C, compound mixed with water has to be stable at 100° C.The principles of steam distillation focus on Raoult’s law and Dalton’s law. However, since it is not soluble in water, it does not depend on its mole fraction in the mixture. Therefore, Raoult’s law does not apply to steam distillation because the compounds are immiscible, so they do not depend on each other’s mole fraction. According to Dalton’s law total vapor pressure is higher than most volatile component and boiling point mixture is lower