Synthesis of Salicylic Acid and Potentiometric Determination of its Purity and Dissociation Constant ------------------------------------------------- Abstract The purpose of the study is to synthesize salicylic acid from the ester‚ methyl salicylate‚ and determine the acid’s dissociation constant and purity. The ester was converted to salicylic acid by base hydrolysis. The products were refluxed and recrystallized‚ to ensure maximum purity‚ and filtered‚ dried‚ and weighed. The melting point
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Exercise No. 8 CARBOXYLIC ACIDS AND ACID DERIVATIVES I. OBJECTIVES: • To investigate the physical and chemical properties of Carboxylic acid and its derivatives • To understand the reactions of carboxylic compounds and derivatives. II. EXPERIMENTAL RESULTS Solubility of Carboxylic acids in 10% NaHCO¬3 Acetic acid - formation of bubbles Benzoic acid - formation of bubbles Test for Acetic acid NaOH + Acetic acid - blue litmus paper turned red NaOH + Acetic acid + FeCl3 - red colored
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Isoamyl Acetate Synthesis through Fischer Reaction Lesaca‚ Anna*‚ Lopez‚ Maria Flor‚ Lu‚ Ricardo‚ Magdurulan‚ Tricia 2Biology6‚ Department of Biology‚ College of Science‚ UST‚ Manila annalesaca@yahoo.com Abstract Esters are a type of functional group that causes distinguishable flavors or odors of some fruits. It can be synthesized by Fischer reaction‚ which is an acid-catalyzed reaction of an alcohol and carboxylic acid. One of the esters known for its characteristic banana flavor is the isoamyl
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Synthesis of 1-Bromobutane from 1-Butanol Reference: Discovering Organic Chemistry in the Laboratory; John R. Ganson Ph. D‚ Revised 2011 by Alfredo Mellace Ph. D www.Aldrich.com Purpose: To synthesize 1-bromobutane from 1-butanol via SN2 reaction. Alcohols are converted into the alkyl halides adding an aqueous solution sodium bromide. The sulfuric acid acts as a catalyst in converting the OH functional group of butanol‚ to a better leaving group. In order for this reaction to synthesis 1-Bromobutane
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Synthesis of Phenacetin from para-Acetamidophenol Aims: To determine how phenacetin from acetamidophenol (known as paracetamol) is synthesized using Sodium Ethoxide Iodine‚ which is the Williamson Ether synthesis. Experimental: Sodium metal was patted dry to remove any oil and was cat into small pieces. A dry 100cm3 round bottom flask was placed on a cork ring‚ on a balance and tarred sodium metal (0.6g) was placed into the flask. The flask was then attached to the dry reflux condenser
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The unknown carboxylic acid’s melting point was 108°C according to the Mel-Temp machine. The melting point is the temperature at which a solid precipitate changes into its liquid form upon heating. The melting point of benzoic acid‚ the aromatic carboxylic acid was 122°C. Thus‚ the product contained impurities which caused the solid to melt at a lower temperature than the actual temperature. Pure solids typically melt at higher temperatures while impure solids melt at lower temperatures. This is
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CONTRIBUTION T HE O RCAXIC FROM CHEMICAL RESEARCH SECTION‚ LEDERLE LABORATORIES v r s r o x ‚ MERICAN VASAMID U~ A C R Co.‚ PBARLIVER‚X. Y . ] &Butyl Esters of Amino Acids and Peptides and their Use in Peptide Synthesis1 BY GEORGEv. ANDERSON i A ND FRANCIS. C.4LLAHAN M R ECEIVED NOVEMBER 1959 30‚ T he s ynthesis of t-but)-1 esters of amino acids and peptides and their use in peptide synthesis is described. T h e most convenient method was the acid-catalyzed reaction of isobutylene
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becoming more and more acidic by everyday pollution from houses‚ factories‚ cars‚ and etc. This is the concept of acid rain‚ which according to EPA.gov is a broad term referring to a mixture of wet and dry deposition from the atmosphere containing higher than normal amounts of nitric and sulfuric acids. Acid rain isn’t just rain‚ its forms like hail or snow‚ which is wet deposition‚ and smoke or dust‚ which is dry deposition. The effects of acid rain are quite terrifying bringing all types of problems
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The C-O-C bond angle is 111o‚ slightly higher than the H-O-H bond angle in water because of the stronger electron repulsion between the bulky alkyl groups. Preparation of Ethers: 1. Preparation of symmetrical ethers from alcohols H2SO4 R O R + H2O 2ROH 2. Williamson Ether Synthesis R O Na - - + + + R’X R O R’ + NaX Ar O Na + RX Ar O R + NaX Involves a nucleophilic substitution reaction. Halide ion is displaced by the alkoxide or phenoxide ion. Gives best results
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Acid Base Titration bre’ana March 1‚ 2013 Purpose: The purpose of this experiment is to determine the concentration of a solution of NaOH by titration with a standard solution of HCl. It was also the purpose to determine the concentration of a sample of white vinegar by titration with a standard solution of NaOH. Introduction: Using the method of titration is how the experiment gets to the conclusion of the concentration of a solution. When doing this experiment‚ measurement is very important
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