• Recrystallization and Melting Points Determinantion of Benzoic Acid
    negative value of ΔG, and that’s exactly what’s required in recrystallization. When recrystallized benzoic acids are collected, they are being tested for physical properties such as melting points along with the original crude benzoic acids. Physical properties are defined as properties that can be...
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  • Recrystallization of Benzoic Acid
    percent recovery. Then the goal was to determine the melting point range of the recrystallized benzoic acid and compare it to the melting range of the small sample of the impure benzoic acid. 1.84 grams of pure benzoic acid was obtained, which was calculated to be 75.72% from the 2.43 grams of impure...
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  • Aspirin (Acetylsalicylic Acid)
    iced bath until crystallization completed. Crystals were collected by vacuum filtration and extra solvent pressed out. Crystals were vacuum dried. Recrystallized mass, melting point, phenol test data was collected. Melting-point range of recrystallized Acetylsalicylic acid: Using a Mel-temperature...
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  • Organic Chem
    compounds. • Discussion Assess your results: recovery yields (where you may have lost yield), purity from melting points (degree of purity/impurity, what could be the source of impurity). Reaction Equations Part 1. Salt Formation by Acid-Base Reaction PHENOLS • Phenols are...
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  • Experiment on Isolating a Neutral Compound from a Mixture Containing an Acid Impurity
    evaporating the ether layer 2. Benzoic acid by acidifying the aqueous layer to form benzoic acid, which precipitates. The benzoic acid is then recovered by filtration, washed and dried. Melting points and yield are determined for BOTH products. Procedure (add on): In the text book, you are...
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  • Rise of Han
    . P-nitroaniline was not recrystallized as was documented in the procedure. Results Data Mass Data p-nitroaniline Benzoic Acid Benzile Mass of Crude Component 0.210 g 0.882 g 0.995 g Mass of recrystallized components none 0.438 g 0.649 g Melting Point Data p-nitroaniline...
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  • Recrystallization and Melting-Point Measurement Identifying a Constituent of “Panacetin”
    phenyl succinate. when two Different compounds are mixed, the melting point of mixture drops (know as melting point depression). When X is mixed with m-aminophenol and benzoic acid separately, the melting points of mixtures drop. However, when X is mixed with phenyl succinate, melting point doesn't drop, suggesting that the mixture is still a PURE substance. Therefore, X can only be phenyl succinate....
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  • Crystallization of Benzoic Acid
    portions of 0.5mL of cold water. The crystals were pressed dry as possible on the funnel with a spatula. 6. The melting point of recrystallized benzoic acid was determined. The weight of the recrystallized benzoic acid was determined. The percent recovery was calculated using the equation...
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  • Nitration of Methyl Benzoate
    Nitration of Methyl Benzoate 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...
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  • Benzocaine
    Experiment # 45: Benzocaine Abstract The local anesthetic, benzocaine, was synthesized via the esterification of p-aminobenzoic acid with ethanol. The percent yield of crude product was determined to be 21% and the melting point was recorded at 86.2°C ± 0.2°C, with a 6.3% error from 92°C...
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  • Crystallization
    the three possible unknowns that we could have been given acetanilide, benzoic acid and sulfanilamide, benzoic acid is the only one that is soluble in water at temperatures higher than room temperature. What should have happened when the recrystallized samples’ melting point was checked is that it...
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  • Chem 31.1 Experiment 2 Recrystallization and Melting Point Determination of Benzoic Acid
    RECRYSTALLIZATION AND MELTING POINT DETERMINATION OF BENZOIC ACID ANSWERS TO QUESTIONS 1. How does the use of fluted filter paper hasten filtration? Why is it advisable to place a small piece of wire between the funnel and the mouth of the flask during hot filtration? Fluted filter paper is...
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  • Recrystallization of Benzoic Acid
    , record the mass of the CuSO4 that you obtained. 11. After allowing the benzoic acid crystals to dry for a week, determine the mass and the melting point of the benzoic acid. Experimental Report Write an “experimental” describing the procedure that you followed to recrystallize the benzoic acid...
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  • Exp 3 Synthesis Of Aspirin Formal Lab Report
    (Theoretical) Melting Point of Aspirin 136oC (Haynes & Lide, 2010) Experimental Percent Error [(136oC – 131.5oC)/ 136oC)] X 100 = 3.31% The aim of this laboratory experiment was to synthesize aspirin, also known as acetyl salicylic acid or 2-(Acetyloxy)-benzoic acid, from 2.0g of salicylic...
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  • Benzoic Acid
    paper will be wet. Determine the amount of benzoic acid recovered and, based upon the initial amount you started with, determine the percent recovery. Melting Point: Determine the melting point ranges of the impure benzoic acid and the crystallized benzoic acid (after it is dry). Be sure to grind each...
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  • Grignard Reaction
    % sodium bicarbonate and once with deionized water. Top layer was ether and bottom layer was a clear yellow. We then allowed the ether to dry under the glass hood. We obtained 1.00 grams of crude with a melting point between 159-161°C. It was then recrystallized with 5% ethanol. Ethanol is a good...
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  • Preparation of Methyl M-Nitrobenzoate
    the product was 77.1(C-78.3(C. In comparison to the literature’s melting point, 78(C, the melting point obtained in lab is within MP range and resulted a very pure product. The percent yield of the recrystallized methyl m-nitrobenzoate was 36%. The low percent yield was a chemical error. The group...
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  • Lab 23
    solvent is, therefore, critical to the successful recrystallization. The purpose of this experiment is to select a suitable recrystallizing solvent, to be able to purify and separate acetanilide from the mixture by process of recrystallization, and to compare melting points of recrystallized and...
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  • Report
    , add more alcohol in 5 ml increments until the mixture is transparent. After crystals form, collect the crystals using vacuum filtering. Wash the collected crystals with ice water and then test for salicylic acid. Weigh and determine the melting point of the pure aspirin. Report Sheet Name...
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  • Reearch Paper
    techniques to make an impure sample pure is by recrystallization. This experiment includes the determination of a good solvent for recrystallization for compounds such as: acetanilide, acetamide, aspirin, benzoic acid, naphthalene, and sucrose, for solvents such as: water, ethanol, benzene, and ethyl...
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