Experiment II. Separation Of a Sample Mixture By Liquid-Liquid Extraction Reading assignment: Techniques in Organic Chemistry 2nd ed pages 75-99. 3rd ed pages 113-140. Topics and Techniques i) identification of solvent layers of two immiscible solvents ii) partioning of a compound between two immiscible solvents and determination of KD iii) liquid-liquid extraction with aqueous acids and bases with organic solvents. iv) use of drying agents Introduction Liquid-liquid extraction is a method
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Tyre Recycling : The New Business on the Block Wednesday‚ 31 March 2010 00:00 Nimesh Sharma Opportunities - Manufacturing ------------------------------------------------- Top of Form User Rating: / 174 PoorBest Bottom of Form The number of vehicles hitting the roads is increasing everyday and so is the number of tyres. There is a business opportunity up for grabs and it’s in recycling them. With more than 33 million vehicles added to the Indian roads in last three years‚ can you guess
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Lab 5: The SN2 Reaction: 1-Bromobutane From K. L. Williamson‚ Macroscale and Microscale Organic Experiments‚ 2nd Ed. 1994‚ Houghton Mifflin‚ Boston. p247; revised 2/22/02 Prelab Exercise: Write a detailed flow sheet/ flow chart for the isolation and purification of 1-bromobutane. Designate how each minor-product is removed from the major product and which layer holds the product in each experimental step performed. [pic] Introduction This experiment utilizes SN2 chemistry
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Compound Name CAS Number Reporting Limit Test Method Phthalates (Ortho-phthalates) Di-2-ethylhexyl phthalate (DEHP) 117-81-7 1 µg/L GC/MS (EPA 8270 or ISO/DIN equivalent) butyl benzyl phthalate (BBP) 85-68-7 1 µg/L GC/MS (EPA 8270 or ISO/DIN equivalent) dibutyl phthalate (DBP) 84-74-2 1 µg/L GC/MS (EPA 8270 or ISO/DIN equivalent) diethyl phthalate (DEP) 84-66-2 1 µg/L GC/MS (EPA 8270 or ISO/DIN equivalent) dimethyl phthalate (DMP) 131-11-3 1 µg/L GC/MS (EPA 8270 or ISO/DIN equivalent)
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- Environmental risk may affect the pregnancy if below guideline limit is exceeded : @ bone cement : the data in earlier literature showed in toxic doses to pregnant animal it can Can recurrent abortion‚ skeletal anomalies but in human was unclear . acute toxic dose in animals can casue lung damage and edema estimated at 3‚750 ppm = 15‚375 mg/m3 . In short term exposure of toxic
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#1 (3)NMRQuestion 1 1 / 1 point Equivalent protons in a molecule will result in one NMR signal. How many NMR signals would you predict for each of the following molecules? __1__ benzene __2__ 3-pentanone __4__ toluene __3__ ethanol __2__ t-butyl methyl ether 1. 1 2. 2 3. 3 4. 4 Question 2 1 / 1 point A compound to be analyzed by NMR should be dissolved in a solvent. Clearly the solvent should not have an NMR signal in the spectral area you are trying to analyze. Which solvents are
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In chemistry‚ an alcohol is an organic compound in which the hydroxyl functional group (-OH) is bound to a carbon atom. In particular‚ this carbon center should be saturated‚ having single bonds to three other atoms.[1] An important class of alcohols are the simple acyclic alcohols‚ the general formula for which is CnH2n+1OH. Of those‚ ethanol (C2H5OH) is the type of alcohol found in alcoholic beverages‚ and in common speech the word alcohol refers specifically to ethanol. Other alcohols are usually
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An old well-known method to stabilize a peptide sequences or protein motifs is N-terminal and C-Terminal modification to resistance against exo-nucleases cleavage. Due to its feasibility‚ we decided to perform this type of modification in order to stabilize synthesized sequences based on previous protocols. Understanding the appropriate compound and choosing the way of performance‚ were sensitive and definitely time consuming. Finally‚ N-terminal modification with 5(6) Carboxyfluorescein (FAM) in
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In the experiment‚ 0.3 g of mixture was dissolved in 3 mL of t-butyl methyl ether in a centrifuge tube. Then‚ 2 mL of 0.5 M NaHCO3 was added‚ shaken for one minute‚ and allowed to sit for two minutes so the layers could separate. The lower water layer was removed with a Pasteur pipette and placed in a test tube labeled “Acid.” Next‚ 0.5 mL of distilled water was added to wash the ether layer in the centrifuge tube and then discarded. 2 mL of 0.5 M NaOH was added to the remaining layer‚ shaken for
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8. Terfenedine is an amino diol that is the active ingredient in the antihistamine Seldane. Mass spectral analysis of terfenedine shows a molecular ion at m/z = 471 and a peak at m/z = 472 which is 35.5% the height of the molecular ion. Terfenedine is known to contain C‚ H‚ O and N. (a) Suggest five molecular formulas for terfenedine. (b) Terfenedine has an even number of carbons and contains nine double bonds and four rings. Based on this additional information‚ what is the formula for terfenedine
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