question by the Association for Safe Pharmaceuticals. Therefore‚ the lab must discover the accuracy of the ingredients listed on Panacetin’s label. The unknown in this experiment is presumed to be something similar to acetaminophen‚ such as acetanilide or phenacetin. Recrystallization and melting point temperature were used to help identify the unknown in Panacetin. Recrystallization removes impurities as a substance goes through physical transformations from a solid to a liquid and back to
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the weight and melting point of the final version of the sample. I began the lab with 1.5 grams of the impure acetanilide solute and ended the lab with 0.05 grams of pure acetanilide crystals. The percentage of pure acetanilide I recovered during this lab was 3.33%‚ which is lower than I expected. However‚ the low percentage shows that the impurities within the original impure acetanilide solute were removed. A number of factors could have caused the low yield of pure crystals. The melting
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compound. The methods used to achieve this objective were also hot vacuum filtration in order to remove suspended solid impurities‚ and isolating the pure acetanilide. In the next lab‚ percent recovered was obtained through weighing the acetanilide sample as well as comparing its melting point range. In this experiment‚ the sample‚ acetanilide was weighted to be 1.523 grams. The sample appeared to be a pale mixture of brown flakes before it was crushed into small flakes. When boiling the sample with
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Experiment 3 Objectives Separation by Solvent Extraction To separate a mixture consisting of a carboxylic acid and a neutral compound by using solvent extraction techniques. Introduction Frequently‚ organic chemists must separate an organic compound from a mixture of compounds‚ often derived from natural sources or products of synthetic reactions. One technique used to separate the mixture compounds is called extraction. Extraction is a process
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must be discovered. Panacetin tablets are known to contain aspirin‚ acetaminophen‚ and sucrose; therefore‚ the tablets tested‚ containing aspirin and sucrose‚ are thought to contain an unknown of something similar to that of acetaminophen such as acetanilide or phenacetin. Another problem trying to be sought out in the experiments is whether or not the composition of Panacetin as stated on the label is accurate. The experiment involved the separation of the unknown from the Panacetin by first isolating
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Introduction Friedel-Crafts acylation of anisole with acetic anhydride was used in this experiement to synthesize 4-methoxyacetophenone with the use of a reflux apparatus. Friedel-Crafts reactions can be done by alkylation‚ which involves mixing an alkyl or acyl halide with a Lewis acid‚ or acylation‚ which is done with acid chlorides or anhydrides(Lefevre). Acylation was used because it does not have as many disadvantages aklyations reactions have such as polyalkylation‚ second electrophilic attacks
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crystals of pure compound. Impurities are excluded from the growing crystals and the pure solid crystals can be separated from the dissolved impurities by filtration. Chemical requirement. Solvent: Distilled water‚ Ethanol‚ and Acetone. Solute: Acetanilide. Result: Data and Report Sheet. 1.1 Choosing a suitable solvent. Solvents | solubility | Appearances and quantity of the crystal at room temperature | | Room temperature
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Name: Date: Lab Section: Selected Known Compounds Name Structural Formula Literature Melting Point Acetanilide C8H9NO 114.3°C Fluorene C13H10 116.5°C Experimental Data Sample Composition 1. 100% Acetanilide 2. 10% Acetanilide 3. 25% Acetanilide 4. 50% Acetanilide Fluorene 5. 75% Acetanilide 6. 90% Acetanilide 7. 100% Fluorene Melting Range 108-116°C 108-112°C 105-112°C 102-109°C 105-112°C 109-115°C 108-114.5°C Graph of Data Discussion
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Nitration of Acetanilide Introduction When organic compounds are nitrated it changes the composition and reaction of the compounds.[4] We could benefit from these changes‚ nitration of acetanilide produces a product called p- Nirtoanoline. P-Nitroaniline is commonly used as an intermediate in the synthesis of dyes‚ antioxidants‚ pharmaceuticals and gasoline. P-Nitroaniline is also used in gum inhibitors‚ poultry medicines and as a corrosion inhibitor. [2] Nitration is a type of chemical
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how to dry them and how to obtain a melting point. PRECAUTION: ACETANILIDE AND PHENACETIN ARE EYE AND SKIN IRRITANTS. Minimize contact with your unknown compound. THEORY: In this experiment‚ Panacetin‚ a pharmaceutical preparation will be separated from its components by making use of their solubilities and acid-base properties. Panacetin contains aspirin‚ sucrose and an unknown component that may be either acetanilide or phenacetin. Of the three components‚ only sucrose is insoluble
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