Recrystallization of Benzoic acid Chemistry 204-002 Date: 4/9/2011 Hector Ortega Recrystallization is a method used to purify compounds‚ and this is a very important procedure because compounds are naturally impure. Polarity and solubility play a big role in this experiment and these characteristics are exploited in order to have a crystallization of the desired compound. In this experimented benzoic acid was crystallize using ethanol and water. I chose these solvents based on part C of the experiment
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Experiment 1: Purification of Benzoic Acid by Recrystallization III. Introduction Purification - physical separation of impurities and by-products from an impure sample pure substance. *Distillation- for liquid compounds‚ *Recrystallization- solid compounds Recrystallization - precipitation of a solid cpd. from a saturated solution in the form of crystals through cooling or evaporation -7 steps: 1) selecting the appropriate solvent 2) dissolving the solute 3) decolorizing the
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Benzoic Acid and Benzoates in Food‚ Drinks and Medicines Benzoic acid and benzoates are common additives to food‚ drinks‚ medicines and cosmetics‚ and they also occur naturally in many plants. They are useful chemicals in manufactured products because they kill or inhibit both bacteria and fungi and can act as preservatives. Benzoic acid and benzoates are considered to be safe chemicals for humans when they’re used in small quantities‚ but there are at least two situations in which even small
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Separation of a Carboxylic Acid from a Neutral Compound by Extraction Reference: Smith‚ Chapter 2 (Acids and Bases) Introduction Carboxylic acids and phenols are two families of organic compounds that contain carbon‚ hydrogen and oxygen‚ and also react with water to yield an excess of hydronium ions over hydroxide ions. Pure water has a pH of 7‚ which means it has a hydronium ion concentration‚ [H3O+] of 10-7 M (M = molarity‚ moles/Liter). The hydronium ions in pure water come from the self-ionization
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Unit 4B Task 2 Title Recrystallization of benzoic Acid Aim Equipment 1. Erlenmeyer flask 2. Graduated cylinder 3. Hot plate 4. Small beaker 5. Ice bath (if necessary) 6. Filter paper 7. Buchner funnel 8. Spatula 9. Weighing machine Method 1. Weighing paper was used to weigh approximately 1.00g of ‘impure Benzoic acid to produce re crystallization’. 2. Moved it to a 125ml Erlenmeyer flask. 3. Poured approximately 20ml of distilled water by using a graduated cylinder
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SEGi University Extraction of Benzoic Acid by Balvinder Singh (SCM 015 677) Lab Partners: 1) Surrean Rao 2) Wong Kai Jun 3) Kanaga Luckshimi 4) Sasiskala Regal ECE2332 Chemical Engineering Practices Submitted: 1st October 2013 Supervisor: Mr Ayman William 1.0 Abstract /summary The purpose of this experiment to carry out in the lab is because to determined the capability to water droplet to carry out the liquid-liquid extraction. The studies is to determine
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The obtained mass of benzocaine and benzoic acid mixture was measured to be 2.075 grams. Following being dried for a week the mass of benzocaine was recorded to be 0.250 grams‚ and benzoic acid was recorded to be 0.600 grams. The melting point range of benzocaine was measured to be 89.5°C-91.5°C‚ while benzoic acid’s melting point range was measured to be 129°C-131.3°C. The percent mass recovered was calculated to be 40.96% for the experiment. Table 1 illustrates the collected information. Starting
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Wang Experiment #4 Recrystallization of Pure Phthalic Acid‚ Benzoic Acid and Napthalene Introduction Recrystallization is a important method in purifying organic compounds which are solid. It is an effective method that is important to be familiar with that is essential in the industrial chemical world. This experiment will allow students to be familiarized with the technique of recrystallization by working with phtalic acid‚ benzoic acid and naphthalene from appropriate organic solvents. Experimental
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Unit 4 Assessment 2-Benzoic Acid Synthesis Synthesis and Investigation of Benzoic Acid Our aims: Create benzoic acid using benzaldehyde and hydrogen peroxide. Then remove some impurities from the benzoic acid crystals. Apparatus: Titration Pipette (25 cm3) Burette (50 cm3) Retort stand Clamp Conical flask (250 cm3) Volumetric flask (250 cm3) and stopper White tile Beakers (250 cm3) Dropping pipette Filter funnel Deionised water Phenolphthalein indicator Volumetric flask
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Benzoate from Benzoic Acid October 28‚ 2010 Abstract: This experiment was conducted to synthesize methyl benzoate from benzoic acid and methanol by using the Fischer esterification method. Methanol (12.5ml) and Benzoic acid (4.9 grams) are heated together in the presence of concentrated sulfuric acid (1.5ml) until equilibrium is achieved. A reflux apparatus is set up for 1 hour to carry out the reaction at the boiling point of the solvent (Methanol‚ 2.5ml). Then‚ separation though an extraction
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