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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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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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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and assess the purity of its product‚ to determine the best solvent for a column chromatography separation‚ to determine the somposition of each fraction from a column chromatography separation‚ and to determine whether a substance purified by recrystallization. (2) The most common stationary phases or adsorbents using in TLC are silica gel‚ alumina‚ and cellulose. For each‚ (a) draw its chemical structure and (b) label it as polar or non-polar. Silica gel - polar alumina - polar cellulose
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unknown Conjugated diene in eucalyptus oil‚ to separate the adduct‚ and identify the unknown diene from the melting point of it¡¯s adduct. Introduction: This experiment was performed using techniques of heating under reflux‚ vacuum filtration‚ recrystallization‚ and melting point measurements. These techniques were used to separate the Diels-Alder adduct of the unknown conjugated diene in eucalyptus oil and identify the diene. Dienes contribute to the characteristic flavors and aromas that are found
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(FCC) crystal structure. No additional peaks were observed due to addition of the glass. However‚ as seen in figure inset for the highest intensity peak‚ the peaks have shifted towards higher 2θ values due to a compressive strain induced by recrystallization of doped glass in lattice planes of GDC matrix [10]. The density of the sintered composite pellet was measured using standard weight volume method. This density was compared to the theoretically calculated density of the composite‚ viz. 7.8 gms
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Overall‚ this experiment consisted of over seven parts however‚ because of the amount of time given in summer lab we had to save time and cut some days out. We were able to do this by being given our own Salicylic acid (SA) prepared for us instead of having to used wintergreen to make it and recrystallize it. In addition‚ we skipped the qualitative test of our purity for SA and Aspirin (ASA). The first part of this experiment is the preparation of ASA from SA were‚ we prepared our aspirin from the
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