Synthesis of Methyl Stearate The purpose of this lab was the convert liquid methyl oleate to solid methyl stearate by catalytic hydrogenation. Firstly‚ we produced hydrogen gas using solid mossy zinc and sulfuric acid. Using the hydrogen produced in the previous reaction‚ we were able to convert the liquid methyl oleate to solid crystals of methyl stearate. A mineral oil was also used to bubbler was used to maintain the hydrogen pressure slightly above the atmospheric pressure and to prevent back-diffusion
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Experiment: Preparation and Identification of Dibenzylidene Acetone Purpose: Prepare dibenzylidene acetone by the famous Claisen-Schmidt condensation reaction. Learn the experimental skills of organic synthesis‚ separation‚ purification‚ structural characterization by instrumental analysis. Train the ability to solve the practical problems. Principle: Aromatic aldehydes can have aldol reaction with aldehydes or ketones which have α-hydrogen atoms‚ dehydrate to form high yield of α‚β-unsaturated
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of this lab experiment was to take the reagents of magnesium and Bromobenzene to create the Grignard reagent of phenylmagnesium before its converted to the final product of triphenylmethanol. Then the product was purified via methods such as recrystallization and filtration‚ before it was finally characterized via a series of methods such as TLC‚ melting point‚ IR‚ H NMR‚ and C NMR. Before the lab even began‚ the first thing done to ensure a safe successful reaction was to oven dry all the glassware
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Extraction of Caffeine from Tealeaves Perez‚ Albert Solomon K.*; Quiambao‚ Marie Angela C;.Pascua‚ Hanna Harriette R.; Patricio‚ Maria Roxanne DC.; 2-Chemistry‚ Department of Chemistry‚ College of Science University of Santo Tomas España St.‚ 1015‚ Manila Abstract Caffeine is soluble in both water and organic solvents‚ solid-liquid extraction and liquid-liquid extraction were used in the experimentation process. Caffeine was extracted using hot water‚ however‚ due to its
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Sedimentary rocks in Pakistan range in age from Precambrian to Miocene i.e from oldest to youngest on the geological time scale form 542 million years to latest. Luckily for geoscientists all of them are exposed in different parts of the country. Lithologically they constitute sandstone‚ limestone‚ shale and mixed lithologies of them all. These rocks are exposed all along the mountain ranges from Islamabad in north to Karachi in the south. Igneous rocks are exposed north of Peshawar or only at
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505g Total volume of water used: 15mL Weight of pure compound recovered: 0.262g Melting point of recrystallized benzoic acid: 122-126 degrees Celsius Recovery %= 0.262g/0.505g x 100= 52% Pure benzoic acid was obtained by the process of recrystallization. 0.505g of
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Experiment 2: Extraction – Evaluation Summary Labs reports must be typed and chemical structures must be drawn with ChemDraw. Report must not exceed three pages (including this page). Page limit does not include any attached spectra or references. ** Deductions for hand written report/structures and exceeding page limit ** Report Breakdown Data/Results: _________________ /10 Discussion: _________________ /10 Report Total: _________________ /20 Other Lab Marks
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K(εT)n ‚ where K and n are constants. Finally‚ give a practical process that will strain harden an alloy. c) Thermal processing of a metal allows for the recovery of the initial mechanical properties of an alloy. Describe briefly the recrystallization process indicating the driving force for the process‚ the change in the defect structure of the alloy‚ and the change in microstructure‚ if any. d) Describe a second process which can strengthen a metal. Also‚ explain the importance of dislocations
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reacting the Grignard reagent with acetophenone. The end product was 1‚1-diphenylethanol. Its recorded melting point range was 80°C-81°C‚ which is the same as its literature value. This means that there was no or very little impurity in the recrystallization process From the IR‚ it is evident that the hydroxyl group (-OH)‚
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to yield benzoin. Thiamine catalyst along with water and ethanol were added to the benzaldehyde‚ then NaOH was added until the solution turned yellow. After recrystallization‚ the product was benzoin. Step two was the oxidation of benzoin to benzil. Nitric acid was added to the benzoin and heated‚ this was followed by recrystallization to yield the benzil. In step three the benzil from step two was to be synthesized tetraphenylcyclopentadienone. The benzil and 1‚3-diphenylacetone were mixed
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