If the dehydration reaction of an alcohol is successful, what changes would be seen in the IR spectrum for the product compared to the starting material
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- If the dehydration reaction of an alcohol is successful, what changes would be seen in the IR spectrum for the product compared to the starting material
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- Give the reagent or chemical test that would differentiate the following pairs of compounds. Write chemical equations for the reactions. List of Chemical Tests (choose here)I. Halogenation: Bromination with and without lightII. Oxidation: Reaction with Baeyer’s reagent III. Reaction with Ammoniacal Silver Nitrate (AgNO3) or simply Tollen’s reagent a. benzene and ethylbenzeneb. 1-butyne and 2-butynec. 2-methylpentane and 2-methyl-2-pentened. toluene and 1-methylcyclohexeneElemental gold is being recovered by electrodeposition from a solution with tiny amounts of Au(III). Holding other factors constant, what can be done to maximize the yield of recovered gold?The two most abundant pigments in the chromatography results were carotene and Xanthophyll. What colors are absorbed or reflected by various pigments and how much is there?
- An amino acid mixture of phenylalanine, glycine and glutamic acid is to be separated by paper chromatography.The solvent is less polar than water. Which of these amino acids will have the highest Rf value and which the lowest? Explain.An amino acid mixture of phenylalanine, glycine and glutamic acid is to be separated by paper chromatography. The solvent is less polar than water. Which of these amino acids will have the highest Rf value and which the lowest? Explain.Lipids from an organic sample are extracted separately by column chromatography using the ff eluants: 1st eluant - chloroform: methanol: water (6:3:1) 2nd eluant - methanol: chloroform (9:1) 3rd eluant – petroleum ether: ethyl ether (1:1) Test results for each eluate are tabulated below. Identify the possible lipid present in each eluate. Test Reagents 1. KHSO4 2. HNO3,(NH4)3MoO4 3. CHCl3, acetic anhydride, conc. H2SO4 4. -naphthol, conc. H2SO4 5. Hydroxylamine HCl, FeCl3 6. ninhydrin reagent POSSIBLE LIPIDS: Triacylglycerol, cholesterol, sphingomyelin, lecithin
- Scott test is one of the methods used for screening for Cocaine in Forensic Chemistry. The multi step method consists of a) reacting the sample drug with cobaltous thiocyanate (Co(SCN)2) b) dissolving of the formed precipitate by adding HCl and c) extraction of coordination compound with Chloroform d) measurement of absorbance of extracted coordination compound at 627 nm What is the type of chemical equilibria involved in first step of the method? a.Solubility Product equilibria b.Bronsted Lowry acid – Bronsted Lowry base equilibria c.Complex ion formation d.Coordination compound formationThe standard curve to determine the amount of betacyanin is shown below. You extracted a red pigment from a beet disc (the mass of a disc is 2 g) using 10 ml of 20% ethanol solution. You measured absorbance of the solution above the beet disc every minute for a total time of 20 minutes. The increase in absorbance was linear during a period of time from 1 min to 10 min. The absorbance at 10 min was 0.8. Calculate the amount of betacyanin extracted from 1g of a beet tissue per minute. Explain your calculations. You can use Excel or a calculator.How many mL of methadone is needed for a patient who was prescribed 0.015 g of methadone? The vial reads 6 milligrams of methadone per 1 mL of solution.