procedure and results of the lab. The chemical process studied in this lab was reduction‚ the process of reducing the number of bonds to oxygen and increasing the number of bonds to hydrogen. Other chemical processes included in the lab were recrystallization‚ melting point‚ and extraction. Procedure: Preparation of Vanillyl Alcohol 2.5 mmol of vanillin were dissolved in 2.5 mL of 1 M NaOH solution in a 25 mL Erlenmeyer flask. The flask was swirled to produce a homogeneous yellow solution. The
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humans. The structure of caffeine is shown below. Figure 1: Structure of Caffeine In this experiment‚ you are going to make a small but strong cup of tea and extract the caffeine from it. Also‚ you are going to purify the caffeine by recrystallization and calculate the mass percentage of caffeine in the tea sample using the equation below. Mass % = (wt. of purified caffeine / wt. of tea sample) x 100 Caffeine is a very common substance and is found in coffee‚ tea‚ soft drinks‚ chocolate
Free Chemistry Solvent Caffeine
Introduction The purpose of this lab is to synthesize Lidocaine from 2‚6-dimethylaniline‚ using diethyl amine‚ 2-chloroacetyl chloride‚ acetic acid‚ and toluene. The Lidocaine was made by adding 2‚6-dimethylaniline to 2-chloroacetyl chloride in acetic acid. Sodium acetate is added in order to make the compound soluble. The product is dried‚ then treated with diethyl amine and toluene. This is refluxed using a water-cooled reflux condenser. The vapor is condensed by the cold water as the compound
Free Solvent Acetic acid Ethanol
catalysis of concentrated sulfuric acid. The reaction between nitric acid and sulfuric acid resulted in the formation of nitronium ion NO2+. It then acted as strong electrophile that nitrated the benzene ring. After that‚ vacuum filtration and recrystallization were methods used to obtain the final product with minimal impurities. The mass of product
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Date of Experiment: September 10th‚ 2013 Organic Chemistry II – CHLB330 Name: Symone E. MoxeyLab Partner: Lynden Cooper Synthesis of Aspirin (Acetylsalicylic Acid) Abstract:- Aspirin (acetylsalicylic acid) is produced experimentally in the lab. The resulting percentage yield is 65.5%. The purity of the obtained product is tested using the melting point and Ferric Chloride Test (FCT). The aspirin was massed‚ and the melting point was determined. Based on the data collected‚ there was a total
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synthesize the Grignard reagent‚ phenyl magnesium bromide‚ and then use the manufactured Grignard reagent to synthesize the alcohol‚ triphenylmethanol‚ by reacting with benzophenone and protonation by H3O+. The triphenylmethanol was purified by recrystallization. The melting point‚ Infrared Spectroscopy‚ 13C NMR‚ and 1H NMR were used to characterize and confirm the recrystallized substance was triphenylmethanol. Introduction A Grignard reagent is a type of organometallic‚ which consists of a bond
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exists as an oil at room temperature. Results The experiment produced 0.033 g of white crystal product‚ an 11.7 % percent yield. The melting point range of the product was 80.0°C-82.3°C. Small amounts of yellow oil was also produced before recrystallization. Attached are the 1H NMR spectroscopy of both the product and the oil side product from the reaction. Discussion This reaction proved to be inefficient‚ yielding only 11.7% of product. Perhaps letting the reaction run longer than an hour would
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Operational Organic Chemistry: A Problem-Solving Approach to The Laboratory Course. 4thEdition. 2009. Pearson-Prantice Hall‚Upper Saddle River‚NJ.p. L9–L10. 2. Recrystallization. Chemwiki. UcDavis. Web. 2014 http://chemwiki.ucdavis.edu/Physical_Chemistry/Physical_Properties_of_Matter/Solutions_and_Mixtures/Case_Studies/RECRYSTALLIZATION 3. Fried‚ Bernard. Thin Layer Chromatography. 4th Edition. Marcel Dekker‚ Inc. New York‚ 2005.
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Experiment 3 Preparation of 2‚ 4-Dinitrodiphenylamine Courtney Elahee Claim: The evidence will show that the red solid collected after recrystallization from the nucleophilic aromatic substitution of 2‚ 4-dinitrobromobenzene and aniline has the characteristics of 2‚ 4-dinitrodiphenylamine. Evidence: The procedure was carried out as described by Ault1 and the lab manual2. 2‚4-dinitrobromobenzene (0.92g‚ 3.75mmol‚ pale yellow solid) and aniline (0.7mL‚ 0.7g‚ 7.5 mmol) were boiled in ethanol (10mL)
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Preparation Of Triphenylmethanol Objectives 1. To study the preparation of triphenylmethanol using through Gridnard reaction 2. To study the operations of anhydrous reaction‚ water vapor distillation. Principles Alcohol is widely used in organic chemistry‚ not only as solute but also as intermediate to synthesize halide‚ alkene‚ ether‚ aldehyde and ketone etc. In laboratory‚ an important method of synthesizing alcohol is though the addition reaction of Gridnard reagent and carbonyl compound‚ whereas
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