In this experiment‚ we used methyl benzoate from the last experiment with HNO3 and H2SO4 to synthesize methyl 3-nitrobenzoate. First we added methyl benzoate to 12 mL cooled conc. Sulfuric acid in a flask. In a separate flask‚ we made a solution of 4 mL conc. Sulfuric acid and 4 mL nitric acid and then added dropwise to the solution of methyl benzoate in an ice bath on a stir plate while maintaining the temperature of reaction between 5-15 °C. After the addition was complete we took the flask out
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family‚ a group of compounds that possess antibacterial and antifungal properties. These agents are esters of para-hydroxybenzoic acid‚ which is why they are collectively called parabens. However‚ in contrast to its cousins‚ ethylparaben‚ butylparaben‚ and propylparaben‚ methylparaben receives its specific name owing to the fact that its chemical structure contains the methyl alkyl group. Methylparaben is found in several fruits‚ in particular blueberries‚ where it acts as an antimicrobial agent. Methylparaben
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In this experiment the initial mass of the sodium carbonate used was 2.69g. In each titration‚ 3 drops of methyl orange was added to the sodium carbonate solution. With this information the titration can begin‚ and the results obtained are shown below: Titration readings Titration Rough 1 2 3 4 5 Initial 0.00 4.30 22.00 21.00 15.00 25.90 Final 4.30 22.00 38.60 37.60 32.60 42.20 Titre (cm3) 4.30 17.70 16.60 16.60 17.60 16.30 Therefore‚ the average titre would be calculated as follows;
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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 methanol. This reaction is an example of an electrophilic aromatic substitution reaction‚ in which the nitro group replaces a proton of the aromatic ring. Following recrystallization‚ melting point and infrared
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Ngoc Pham Chem162B Lab #2: Trends in Periodic Table Date: 01/10/2011 Lab partner: Ian Bauer Result Section: Table I: The solubility of the alkaline earth metal ions | SO42- | CO32- | C2O42- | IO32- | Mg2+ | S | I | S | S | Ca2+ | I | S | S | I | Sr2+ | S | S | S | I | Ba2+ | I | I | I | S | Key: I- insoluble‚ S-soluble Table II: Color of water (Halide) and Halogen (Hexane) layers | Cl2 | Br2 | I2 | Hexane layer | Clear | orange | Pink | Water layer | Clear‚
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To synthesis methyl orange by coupling diazotised sulphanilic acid with N‚N-dimethylaniline. Materials (Chemicals) Sulfanilic acid‚ 2.5% aqueous sodium carbonate solution‚ sodium nitrite‚ concentrated hydrochloric acid‚ N‚N-dimethylaniline‚ glacial acetic acid‚ 10% aqueous sodium hydroxide‚ saturated sodium chloride solution Apparatus 50 mL Erlemeyer flask‚ 250 mL beaker‚ test tube‚ hot plate‚ Buchner funnels Procedure In a 50 mL Elermenyer flask 1.2 g of sulfanilic acid and 12.5 mL of
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Nitration of Methyl Benzoate Introduction: Nitration is an example of an electrophile aromatic substitution reaction‚ where nitro (NO2) group is being substituted for a hydrogen on an aromatic compound. This is achieved by the formation of the nitronium ion by protonation of nitric acid from sulfuric acid. The zirconium ion is a strong electrophile and can react with aromatic compound such as Methyl benzoate to form an arenium ion intermediate. The arenium ion is then depronated to reform
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isopentyl acetate from isopentyl alcohol and acetic acid by the Fischer esterification reaction. Materials: West condenser‚ 250 mL round bottomed flask‚ two 250 mL flasks‚ heating mantle‚ boiling chips‚ graduated cylinder‚ sodium bicarbonate‚ isopentyl alcohol‚ glacial acetic acid‚ concentrated sulfuric acid‚ separatory funnel Procedure: 1. Place 50 mL of isopentyl alcohol in a 250 mL round bottom flask and add 60 mL of glacial acetic acid. Add the acid very slowly. 2. Swirl the flask and carefully
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two π electrons from the aromatic ring serve for the ring to act as a nucleophile and attack an electrophile. For nitration‚ this nucleophile is NO2+‚ which is produced by reacting nitric and sulfuric acids. After the nucleophile adds‚ the ring has lost aromaticity. Therefore‚ the deprotonated acid in solution can pull off a hydrogen from the same carbon that the nitro group has added to‚ allowing the electrons from that bond to go back into the ring to reproduce aromaticty. There are three possible
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Dissociation is a protective mechanism that stimulates a person to enter into a detached state‚ in which the person is completely separated from his or her usual thought processes and memories. It is a state activated by one’s nervous system upon reaching maximum capacity to process the “real” stimuli around him or her‚ thus causing that person to lose track of time and find another representation of himself to continue in that moment. In “When I Woke Up Tuesday Morning‚ it was Friday‚” author and
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