water b. Naphthalene in water c. Amphetamine in ethyl alcohol d. Aspirin in water e. Succinic acid in hexane f. 1-Decanol (n-decyl alcohol) in water 2. Predict whether the following pairs of liquids would be miscible or immiscible. It may be helpful to look up some of the chemical structures. (3pts) a. Benzene and water b. Water and methyl alcohol c. Hexane and benzene d. Methylene chloride and benzene e. Water and toluene f. Ethyl alcohol and isopropyl alcohol
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Scheme 5.5: KMnO4 is the oxidant in this reaction that oxidizes the alcohol to the ketone. The CuSO 4 is there to support the KMnO4. The oxidant reacts with the secondary alcohol which forms benzophenone and MnO2. Then the melting point of the hexanes will be identified. The reactant is a secondary alcohol therefore there would be no over-oxidization. The purity of the benzophenone by recrystallization will be analyzed using thin layer chromatography (TLC) analysis. Two TLCs is done in this experiment
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The TLC plate remained blank showing proof of no compound other than the hexane itself. This error was expected since in the first part of the experiment‚ oxidation of fluoreneto Fluorenone was supposed to be done to a 50-50 level. As mentioned earlier‚ the oxidation had carried out longer than expected and hence the sample contained
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TLC FULL LAB REPORT Objective: The purpose of this experiment was to identify compounds in a mixture by Rf values and to determine the best solvent to use. Also is the analysis of mixtures before‚ during and separation. Possible solvents: Hexane MW- 86.17 g/mol Hazards-flammable‚ harmful if swallowed Melting pt / boiling pt (degree Celsius) - 69 Density-.6548 g/ml [pic] Methanol MW-32.04 g/mol Hazards- flammable‚ eye irritant Melting pt / boiling pt- 65 Density-.7918 g/ml [pic]
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Title: Redox Reaction Introduction: Some of the most important chemical reactions are Redox reactions. They are also known as oxidation-reduction reactions. This reaction passes one or more electrons from one species to another. The species that loses electrons are being oxidized while the species that gains electrons are reduced. The reaction occurs simultaneously. Numbers are given to each element in a chemical reaction to help us find out which element is oxidized and which is
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Determine mole fractions: H2O ⇒ 1.34 mol / (1.34 mol + 0.543 mol) = 0.71 C2H5OH ⇒ 0.543 mol / (1.34 mol + 0.543 mol) = 0.29 Example #3: A solution contains 10.0 g pentane‚ 10.0 g hexane and 10.0 g benzene. What is the mole fraction of hexane? Solution: 1) You need to determine the moles of pentane‚ hexane and benzene: to do this‚ you need the molecular weights. Here are the formulas: pentane: C5H12
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was then produced by the filtered solution of crude acetanilide and recrystallizing solvent. Choosing of the recrystallizing solvent was done by placing a small amount of pure acetanilide in three test tubes‚ each containing: water‚ 95% ethanol and hexane. The final weight produced by the pure acetanilide is 1.1g contrary to the weight of the crude of the acetanilide which is 0.5g. Quantitative analysis showed that the pure acetanilide produced 37.04% percentage yield. Introduction Recrystallization
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Abstract In the asymmetric synthesis of (S)-Ibuprofen‚ the compound is synthesized in nonracemic form directly from an achiral precursor. First‚ racemic ibuprofen was converted to aN achiral ketene via the acid chloride by adding thionyl chloride followed by triethylamine. Then‚ ketene was reacted with a chiral and nonracemic (S)-ethyl lactate produces a mixture of diasteromeric esters of ibuprofen derivatives where (S) configuration is predominantly. Finally‚ hydrolysis of the ester then provides
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acetone was added to the spinach leaves and mixed as before‚ repeated twice. 5. 25 mL of hexane was added to the separatory funnel and mixed with venting. 6. 25ml of saturated sodium chloride was added to the separatory funnel and mixed. 7. The aqueous layer was collected in a beaker and the organic layer was placed in another layer. 8. The aqueous layer was then extracted with 25 mL of hexane and the organic layers combined. 9. The combined organic layers were then extracted with
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When choice bioassay was carried out‚ the hexane and methanol extracts from roots of A. paniculata did not show any significant activity at various treatment doses‚ when observations were taken after 24 hours (table 2). When the observation period was extended to 48 hours‚ antifeedant activity significantly enhanced to 50.53 % at maximum dose (0.1 %) with hexane extract. Antifeedant activity was significantly superior at the higher doses of 0.03%‚ 0
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