Samantha Smith Organic Chem 255 Lab M/W 12:30-4:30 Hyejin Cho 12 June 2013 Separation of a Mixture Abstract: In this experiment‚ the three processes of extraction‚ sublimation and recrystallization will be used to separate a mixture of salicylic acid and naphthalene. The first part of extraction will be to separate the salicylic acid from the naphthalene using diethyl ether and aqueous sodium bicarbonate. The naphthalene will reside in the ether and be the top layer‚ while the
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stopper White tile Beakers (250 cm3) Dropping pipette Filter funnel Deionised water Phenolphthalein indicator Volumetric flask Melting point experiment apparatus Melting point apparatus Capillaries Thermometer Bunsen burner Recrystallization Filter paper Buchner funnel Conical flask Specular Benzaldehyde + hydrogen peroxide Heat mat Beaker Conical flask
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distillation and recrystallization using a suitable solvent determined through a solubility test. The identification method used was through Melting Point Determination. By obtaining data of the melting points of the 2 purified compounds and cross-referencing from a list of possible organic compounds‚ the 2 organic compounds were identified to be Dibenzalacetone (Neutral) and o-Chlorobenzoic acid (Acidic). Results A solubility test was conducted to determine the recrystallization solvent to be used
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solubility in the early part of the synthesis. Due to this fact‚ any unreacted starting materials would remain soluble throughout the recrystallization process. Additionally‚ the Diels-Alder product is soluble in boiling xylene‚ but insoluble in cool xylene. This makes for an ideal recrystallization solvent. The purified crystals that were collected from the recrystallization were a faint off-white color‚ with a regular‚ shiny plate-like shape. The purity of the crystals was improved as seen in the melting
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4 4.3 Melting Point 4 4.4 Appearance 4 5 Discussion 5 6 Conclusion 5 References R1 Synopsis This report is based on preparation and recrystallization of aspirin. The objective of the experiment is to conduct the synthesis of aspirin and reinforce the skills of recrystallization and technique of melting point determination. Both experimental successes and errors were analyzed. The mass of recrystallized aspirin recorded was 0.85g‚ which led to a low percent
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CHOONG SHING YI Preparation and Recrystallization of Aspirin Preparation and Recrystallization of Aspirin Date of the experiment: 9 May 2013 Date of submission: 23 May 2012 Date of the experiment: 9 May 2013 Date of submission: 23 May 2012 Synopsis 1. General Objective: To familiarize with the preparation of some simple organic compound and purify the compound by recrystallization. Specific Objective: The experiment is carried out to:
Free Aspirin Acetic acid Acetic anhydride
Within this experiment‚ Acetaminophen will be formed through the reaction between p-aminophenol and acetic anhydride. This reaction will incur Acetaminophen as a crude solid being impure‚ which will be purified further through the use of a recrystallization technique. The purification process involves dissolving a solid and recrystallizing as a crystal solid from the solution. The process is follow by heating the crude solid to dissolve using a minimal amount of solvent‚
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solid C were both extracted from unknown solution by first using chemically active liquid-liquid extract‚ followed by vacuum filtration. Liquid C and solid C were then purified with the use of simple distillation and recrystallization respectively. Through the process of recrystallization‚ the percentage purity of solid C was found to be 6.01%. The melting point range of purified solid C was 117.0 – 119.0C while the boiling point of liquid C was found to be 117C. The identity of solid C and liquid
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Experiment 2 and 3: Synthesis of Aspirin and Determination of Melting Point A. Abstract Aspirin is the common name for the compound acetylsalicylic acid‚ widely used as a fever reducer and as a pain killer. The first part of the experiment aims to synthesize aspirin from the reaction of salicylic acid with acetic anhydride with the aid of phosphoric acid as a catalyst. The second part of the experiment aims to assess the purity of aspirin through the determination of its melting point and
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tin tetraiodide. Tin tetraiodide was recrystallized after the synthesis. The percent yield and the theoretical yield of tin tetraiodide were calculated. Recrystallization is to further improve the purity of tin tetraiodide. The solvent is carefully chosen to be toluene in order to maximize the recovery of tin tetraiodide during recrystallization. Experimental method1 Approximately 2.50g iodide and 1.01g tin were weighed on a balance and were placed in an Erlenmeyer flask. Approximately 10ml
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