from willow bark – willow bark contain an active ingredient know as salicylic acid which used to make aspirin (pain reliever) Identifying salicylic acid Three chemical tests which are used to predict the structure of salicylic acid 1. Salicylic acid in aqueous solution is weakly acidic ( presence of COOH group) 2. Salicylic acid reacts with alcohols to form esters which give of strong odours. 3. When salicylic acid is added to a neutral solution such as iron chloride it turns intense pink colour
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the textbook says in regards to the history and uses of the chemicals that are being utilized in the experiment. Nothing elaborate – just the basic idea behind the reaction. Reaction (3 points) Reaction: sodium benzoate + hydrochloric acid ( benzoic acid + sodium chloride Amounts: 2.00 g 5.0 mL 3M + HCl → + NaCl ***Note that if there is no “reaction”
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effectively killing most yeasts‚ bacteria and fungi. Sodium benzoate is effective only in acidic conditions (pH < 3.6) making its use most prevalent in foods such as preserves‚ salad dressings (vinegar)‚ carbonated drinks (carbonic acid)‚ jams (citric acid)‚ fruit juices (citric acid)‚ and chinese food sauces. It is also found in alcohol-based mouthwash and silver polish. More recently‚ sodium benzoate has become apparent in many soft drinks‚ including Sprite‚ Fanta‚ Sunkist‚ Dr Pepper and Coke Zero. It
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benzoate .210 ml Cold water 1 ml 3 ml conical vial + Methyl benzoate 20.321 g Ice-cold methanol .3 ml Methyl benzoate 0.4095 g Crude product 0.6981 g Sulfuric acid (1st added) .50 ml Melting point (Literature value) 78-80 °C Sulfuric acid (2nd added) .15 ml Melting point (experimental value) 72.4-733.7 °C Nitric acid .15 ml Molar mass of methyl benzoate 136.15 g/mol Molar mass of methyl m-nitrobenzoate 181.15 g/mol Molar mass of HNO3 63.01 g/mol Melting point (Literature
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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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(E)- and (Z)-Phenylcinnamic acids Thusanth Jogarajah‚ Dr. Lana Mikhaylichenko * Department of Physical and Environmental Sciences‚ University of Toronto Scarborough‚ 1265 Military Trial‚ Scarborough‚ ON‚ M1C 1A4 Received: February 6‚ 2013; E-mail Thusanth.Jogarajah@mail.utoronto.ca Abstract – Add text here Introduction: The name of this reaction is called the Perkin’s reaction. The reaction was first used by William Perkin to create phenylcinnamic acids (Johnson). It is very similar
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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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salicylic acid (Hint: You should use your empirical data to support your claim). -The Salicylic acid that I obtained had a melting point range around 157-158 degrees Celsius for Part A. For Part B the melting point range was 156-157.5 degree Celsius. Part B‚ I would say the sample is less pure because of the notion that impurities lower the melting point. Since part A ‘s melting point was higher and closer to the melting point of the pure sample‚ it was more pure. The pure Salicylic acid that I got
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Molecular weight MP/BP Grams Used Moles Used Methyl benzoate 136.16 g/mol -12.5 OC /199.6 OC 0.28g 2.056*10-3 Sulfuric acid 63.01 g/mol 10 OC /337OC 0.8g 1.2*10-2 Nitric acid 98.08 g/mol -42 OC /83 OC 0.2g 2.039*10-3 Methyl 3-nitro benzoate 181.15 g/mol 78 OC /279 OC 0.107g 5.906*10-4 Procedural Details To a reaction tube 0.6 mL of concentrated sulfuric acid was added; followed by 0.28g
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RECRYSTALLISATION PRESNTED BY Mariam SeiduPriscilla TweneboahEvans Appiah-Kubi 3796509 Yaw Adu PokuEric Adjei 3809009 INTRODUCTION Recrystallization is a method of purifying a solid. There are two types of impurities: those more soluble in a given solvent than the main component and those less soluble. (If there are any impurities that have the same solubility as the main component‚ then a different solvent needs to be chosen.) When organic
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