extraction You would see in this figure a CH2Cl2 layer and water layer has formed. The CH2Cl2 that is in the lower layer was drained into a clean flask. This was repeated twice until all the CH2Cl2 was combined. Thereafter‚ it was put into a separatory funnel where it was washed with 20 ml 6M NaOH solution. The latter was discarded after. | Figure 2. Purification The crude caffeine
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requires that the components of the mixture have different solubilities in a particular solvent. AimThe purpose of this experiment is to separate sodium chloride/charcoal and sodium chloride/copper(II) chloride mixtures. Equipment requiredBalanceFilter funnel standFilter funnelBunsen‚ tripod and gauze matWatch glassGlass rodBeakers (two 100mL)Graduated cylinder (25 mL)Filter paper (Whatman No. 1—three 12.5 cm sheets)Sodium chloride/charcoal mixture (4 g)Sodium chloride/copper(II) chloride mixture (8 g)Ethanol
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another to provide the mass of the sulphamic acid. 2) The sulphamic acid was then dissolved in 50cm³ of distilled water‚ using a glass rod to ensure it is completely dissolved. 3) Using a funnel‚ we poured the solution into the 250cm³ volumetric flask‚ ensuring the beaker‚ glass rod and funnel were cleaned with distilled water into the volumetric flask to provide that all of the sulphamic acid in the solution was in the volumetric flask. 4) We filled the volumetric flask with distilled
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Recrystallization and Melting Point Determination W. H. Bunnelle‚ L. A. Meyer‚ R. E. Glaser (Version 3) Introduction Consider what happens when a solid material is placed in a solvent in which it has a low solubility. Not much! A small fraction of the solid will dissolve‚ but the rest will just sit there. (Actually‚ it doesn’t just ’sit there’ since an equilibrium is in effect‚ with solid molecules going into solution‚ and an equivalent number of dissolved molecules reforming solid‚ but we
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THE STUDY OF CHLOROPHYLL CONTENT IN VARIOUS PLANTS A Project Report Submitted by SANDEEP SETHI In partial fulfillment of the CBSE GRADE XII IN BIOLOGY AT 2015-16 CERTIFICATE This is to certify that Sandeep Sethi of grade XII‚ ST. XAVIER INTERNATIONAL SCHOOL‚ BHUBANESWAR with Registeration Number _______________________ has satisfactorily completed the project in Biology on STUDY OF CHLOROPHYLL CONTENT IN FIVE DIFFERENT SPECIES OF PLANTS‚ in partial fulfillment of the requirements
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Abstract: The purpose of this lab is to prepare phenylmagnesium bromide‚ a Grignard reagent‚ and react it with benzophenone to give triphenylmethanol. Once made‚ the Grignard reagent will do a nucleophilic attack on the carbonyl carbon of the ketone‚ benzophenone. The result is an alkoxide that is then protonated to give the alcohol‚ triphenylmethanol. The purity of the final product will then be considered by melting point and IR spectroscopy. Final purified triphenylmethanol weighed 8.02 grams
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Synthesis of Banana Flavor via Fischer Esterification Patricia Faye R. Agnila‚ Joan Karla M. Alvaran*‚ Micaela Isabel N. Arellano‚ and Denzel Nicho T. Armendares Department of Biological Science‚ College of Science‚ University of Santo Tomas‚ Manila‚ Philippines Abstract This experiment is conducted to exhibit the synthesis of banana
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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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Old Dominion University ORGANIC 214 Alkene Addition Submitted by: Alkene addition: Bromination of (E) Stilbene Introduction: In this lab we used the greener approach‚ which involves the addition of bromine across a double bond. When bromine reacts with E-stilbene (trans-1‚2-diphenylethene)‚ two new chiral carbons are created from the sp2 carbons‚ therefore 3 different dibrominated stereoisomers are possible: meso-(1R‚2S)‚ or the raceminc mixture-(1R‚2R) or (1S‚2S)-dibromo-1‚2-diphenylethane
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those who agreed and those who did not agree with the US’s involvement in the Vietnam war. When he received his inauguration‚ Tom was trapped and felt hopeless. “All around me the options seemed to be narrowing‚ as if I were hurtling down a huge black funnel‚ the whole world squeezing in tight. There was no
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