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Analysis of commercial aspirin
Determination of the concentration of sulphuric acid solution lab Report
Analysis of commercial aspirin
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A bath was prepared using a 400 mL beaker filled halfway with water. The bath was then sat on a hot plate and lest to boil. 2g of salicylic acid was placed in a 125 mL Erlenmeyer flask with 3 mL of acetic anhydride, and 3 drops of concentrated sulfuric acid. The solutions were mixed and placed in the boiling water bath. The solution was left in the boiling bath for 30 minutes. The 125 mL Erlenmeyer flask was removed and placed on the side to cool to room temperature. Once cooled the solution was placed into a 150 mL Beaker that was filled with 20 mL of ice water. As the beaker was placed in the ice bath, it was simultaneously scraped with a glass rod until crystals formed at the bottom of the beaker. The crystal solution was poured into a Buchner
Experiment: First prepared a well plate with the appropriate amounts of distilled water, HCl, and Na2S2O3 in each well according to the lab manual. The well where the reaction
In the first part of the experiment, The mixture was combined with saturated sodium chloride, and the aqueous layer, containing alcohol, some acid, and water, was discarded. The organic layer was then dried with granular anhydrous sodium sulfate; this drying agent is used to absorb any water in a solution and should thus, result in a colorless solution. The final product was collected; it was mostly clear, though it has a pale yellow tint. Data Table 2 shows the results and calculations that were gathered after the completion of this experiment. No errors had occurred during the course of the experiment, which is testified by the fairly, high yield of Data Table 3 indicates the observations from these tests.
In this experiment, I was making a sample of aspirin and then testing it in order to see how pure the sample of aspirin was. By doing this experiment, I was leaning how to crystalize products, and then used the theoretical yield, along with the percentage yield in order to calculate the amount of aspirin that I had created in the sample. Aspirin is an anti-inflammatory, and analgesic, meaning this medication can reduce inflammation, fever, and pain by blocking the enzymes that promote these issues, and reducing the production of more of these enzymes all over the body.
8. Continue stirring. Record the temperature at which crystals begin to appear in the solution.
This was allowed to mix for a few minutes; a little excess water was used to ensure that sodium bromide was fully dissolved. This mixture was placed in an ice bath while continuing to stir. 1.3 ml (24.39 mmols) of concentrated sulfuric acid was added dropwise. The flask was removed from the ice bath and heated to reflux for 1 hour while continuing to stir. The resulting top layer was transferred to a conical vial in which 1.5 mL (22.51 mmols) of 80 % sulfuric acid was added. 2.0 mL of water was added to allow a layer to form. The bottom layer was removed and transferred to another conical vial in which 2.0 mL of saturated sodium bicarbonate was added. The bottom, organic layer, was transferred to a conical vial. Calcium chloride, a drying agent, was used to collect the remaining aqueous layer that
The purpose of this experiment is to prepare and observe the properties of esters. The ester that will be synthesized in this methyl Salicylate
The solution is then stirred with a glass rod and put to cool in an ice-water bath before the slow addition of 1.0 mL of concentrated sulfuric acid (H2SO4) into the cold mixture in order to prevent the transpiration of undesired side reactions. In a separate test tube, 1-2 mL of 3 M aqueous sodium hydroxide solution can also be placed in the ice bath for extraction later on. After the mixture of NaBr, H2SO4 and 2-phenylethanol has been cooled and mixed, a solid will form. At this point, the application of the method of reflux can commence in order to both increase the reaction rate and to prevent any liquids from being evaporated, due to constant application of heat. With the apparatus set up (in addition to making sure all joints are well sealed, excluding the condenser top), the vial can then be put out of the ice bath, and put to warm. With stirring, all of the solid will eventually dissolve, and with constant heating, the mixture will gently reflux at around 160 ºC (using thermometer in the metal block to confirm), where the biphasic reaction mixture can then vigorously be stirred (with certain
The rubber tube was connected to the water aspirator to form a vacuum suction which would help filter the pure aspirin out. By the 25-mL of chilled distilled water added to the flask would break up crystal lumps utilizing the stirring rod. The filter paper was moistened by adding 2-mL of chilled distilled water after applying the filter paper to the Büchner funnel and turn on the aspirator. The reaction mixture was then gradually added to the Büchner funnel and the water aspirator was disconnected. Then 15-mL of chilled distilled water was added to the Büchner funnel and the aspirator was turned on for 15 minutes and was disconnected when the crystals looked
In acid-base titration solution without a known molarity is placed in an Erlenmeyer after it’s volume is measured. An indicator is added to the solution most of the time it is phenolphthalein. The solution with a known concentration is placed in burette with a tap in the end. By opening the tap slightly solution in the burette is poured in to the solution in Erlenmeyer drop by drop. After a while the solution in Erlenmeyer forms a color change. This is the turning point for the solution. At the turning point by the volume consumed in burette the molarity of the other solution can be
The medication of paracetamol can be administered in various ways and they are sold in different formulations. The common dosage comes in tablets form of 500 mg, in dispersible fizzy tablets (500 mg) and oral suspensions. It can also be bought in capsules as a mixture with other API like caffeine and codeine.
In a 100ml beaker 30mls of water was placed the temperature of the water was recorded. 1 teaspoon of Ammonium Nitrate was added to the water and stirred until dissolved. The temperature was then recorded again. This was to see the difference between the initial temperature and the final temperature.
If the solid dissolved in the solvent at room temperature, then it was too soluble and that solvent could be eliminated. The acetanilide is completely dissolved in ethanol and dichloromethane, therefore eliminating them from being the suitable solvent. If the solid did not dissolve at room temperature then it was placed in the sand bath and left to boil. If the solid dissolved, it was placed in the ice bath and if crystals were observed coming out of the solution then the suitable solvent was found. The suitable solvent was water as the crystals came out once placed in the ice bath.
Analysis of Aspirin Tablets Aim --- To discover the percentage of acetylsalicylic acid in a sample of aspirin tablets. ----------------------------------------------------------------- In order to do this, the amount of moles that react with the sodium hydroxide must be known. This is achieved by using the method of back titration.
The sample was subjected to steam distillation as illustrated in Figure 1. A total of 50ml of distillate was collected while recording the temperature for every 5.0 ml of distillate. The distillate was transferred into a 250ml Erlenmeyer flask and 3.0 g of NaCl was added. The flask was cooled and the content was transferred into a 250-ml separatory funnel. Then 25.0ml of hexane was added and the mixture was shaken for 5 minutes with occasional venting. The aqueous layer was discarded and the organic layer was left inside. About 25.0ml of 10% NaOH was then added and the mixture was shaken as before. The aqueous layer was collected and then cooled in an ice bath. It was then acidified with enough 6.00 M HCl while the pH is being monitored with red litmus paper. Another 25.0 ml of hexane was added and the mixture was shaken as before. The hexane extract was saved and a small amount of anhydrous sodium sulfate was added. The mixture was then swirled for a couple of minutes then filtered. A small amount of the final extracted was tested separately with 1% FeCl3 and Bayer’s reagent.
In this experiment the Sodium Hydroxide solution went through three different phases where its quality and quantity changed. The first phase was called I. Preparing Approximately 0.1M NaOH, 1000mL of clear distilled water was boiled and then chilled to room temp.