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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Experiment 11 Title: Spectrophotometric analysis of caffeine and benzoic acid in soft drink. Name: Tan Herh Lim Name of partner: Sia Ting Wai‚ Chong Zheng Yee Date: Lecturer: Dr. Neo Kian Eang Practical class: P1 Objective: To obtain the absorbance of the caffeine and benzoic acid in soft drinks. Introduction Soft drinks that commonly found in our daily life contain caffeine and sodium benzoate. The caffeine act as a stimulant and the sodium benzoate acts as a preservative
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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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ABSTRACT This experiment was conducted to synthesize methyl benzoate form benzoic acid and methanol by using the Fischer esterification method. The Fischer exterification technique is utilized in the academic and industrial settings due to the simplified synthesis and safety parameters of the overall reaction. Both benzoic acid and methanol are relatively cheap to obtain from a commercial source as well as being easy to store with a relatively long shelf life. The Fischer esterification method is
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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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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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Preparation of methyl m-nitrobenzoate by nitration using methyl benzoate‚ nitric acid‚ and sulfuric acid Aileen Quintana TA: Sijie Tues/Thurs 11:50 42067 Introduction: The purpose of this lab was to explore the concepts of electrophilic aromatic substitution‚ specifically nitration by synthesizing methyl m-nitrobenzoate using methyl benzoate‚ nitric acid and sulfuric acid. This nitration is a type of electrophilic aromatic substitution. A
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Title: Experiment 28: Nitration of Methyl Benzoate Objective: The students will learn to nitrate methyl benzoate through electrophilic aromatic substitution reaction. They will learn the importance of regiochemistry in chemical reactions. They might experience disubstitution through a high temperature. Reactions: Observation: The crystals started to form when added 2 g of crushed ice. The addition of hot methanol dissociated the crystals. The crystals reappeared when cooled down in
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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 effective in preventing crystal formation in the filter paper. It is also often used in filtering hot saturated solution used during crystallization. One major advantage of a fluted filter is that it increases
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Eastman solvents—Technical tip Using Eastman methyl acetate in cleaning applications Introduction Considerations Eastman Chemical Company‚ the world’s leading producer of methyl acetate‚ offers this solvent in two grades to suit a variety of application needs: Wide formulation latitude • Regular (industrial) grade offers a minimum assay of 96%‚ a maximum methanol content of 2.5%‚ and a maximum water content of 1.5%. • High purity grade offers a minimum assay of 99.5%‚ a maximum
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