Grignard Synthesis of Triphenylmethanol from Benzophenone Purpose: The purpose of this experiment was to synthesize the tertiary alcohol triphenylmethanol from a Grignard reagent‚ phenyl magnesium bromide. The Grignard reagent was synthesized from bromobenzene and magnesium and then reacted with benzophenone to produce triphenylmethanol. It was important that water be excluded from the reaction‚ in order to prevent the formation of benzene. The reaction of phenyl magnesium bromide and benzophenone
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! Name: Laura Romero ! 5.04H: Gas Stoichiometry Lab Worksheet Data and Observations: Present all relevant data in a data table below. Include an observations section for any observations that you made during the lab. (5 points) Data Table Mass of magnesium strip (grams) 0.032 g Volume of gas collected (mL) 30mL Barometric pressure (atm) 1.1 atm Room Temperature (°C) 22 °C Vapor pressure of the water (torr) 19.8 torr ! ! Calculations: ! 1. Write the
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Experiment #8 – properties of Alcohols and Phenols Introduction As has been mentioned before‚ over 20 million organic compounds have been identified. If each substance had to be studied as an entity completely separate from all the other substances‚ the study of organic chemistry as a whole would be impossible; that is to say‚ even more impossible than you currently believe it to be. Fortunately‚ the subject can be organized and it is often organized around the concept of the functional group
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(10cm3) Density of Sulphuric acid = 1.84g/cm3 Mass of Sulphuric acid = Density x Volume = 1.84g/cm3 x 10cm3 = 18.4g Mr of Sulphuric acid = 98.09g/mol No. of moles of Sulphuric acid = Mass/Mr = 18.4g/(98.09g/mol) = 0.187582832 moles ≈ 0.188 moles Limiting reagent: Sulphuric acid No. of moles of p-Toluenesulphonic acid = 0.188 moles Mr of p-Toluenesulphonic acid = 172.22g/mol Mass of p-Toluenesulphonic acid = Moles x Mr = 0.188 moles x 172.22g/mol = 32.37736g ≈ 32.4g Volume of NaCl solution = 100mL (100cm3)
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N/A 83 0.7856 H2SO4 98.06 ~15drops N/A N/A N/A 327 1.84 Methanol 32.0 ~6mL N/A N/A N/A 64.7 0.7914 Water 18.0 5mL N/A N/A 0 100 1.0 1‚4-Di-t-butyl-2‚5-dimethoxybenzene 250.17 product product 1:1 102-105 N/A N/A Reaction and its Mechanism: The limiting reagent for this reaction is 1‚ 4 – dimethoxybenzene. See calculations section for explanation. Overall Reaction: C8H10O2+
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Abstract: The purpose of this experiment was to synthesize isopentyl acetate via an esterification reaction between acetic acid and isopentyl alcohol‚ using concentrated sulfuric acid as a catalyst. The product was washed with sodium hydrogen carbonate‚ as well as with water‚ then dried with anhydrous sodium sulfate. The product was then distilled using a Hickman still and characterized using infrared spectroscopy. The percent yield of isopentyl acetate was 61.52%. This may have been low due to
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I. Purpose: The purpose of this experiment is to distinguish the relationships between reactants and products‚ in addition to expanding on concepts such as single displacement reactions‚ mole ratio values‚ moles to mass‚ theoretical yields‚ limiting reactants‚ excess‚ stoichiometric relationships and percentage errors. II. Hypothesis: /3 -If the copper metal is submerged in the silver nitrate solution then in reaction‚ a pure‚ solid (Ag) silver product is created with an excess of (Cu
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Observations of the reactions precipitate are recorded. Same process is done with 2-chlorobutane‚ 2-iodobutane‚ and 2-bromobutane. Experimental Stoichiometry Compound | Molecularweight | Quantity | Moles | 2-butanol | 74.12 g | 7.4 mL (6.0 g) | 0.081 | Sulfuric acid | 98.08 g | 20 mL (12M) | 0.24 | Ammonium bromide | 97.94 g | 8.0 g | 0.082 | The limiting reactant is 2-butanol. Yield Data 2-bromobutane | | Molecular Weight | 137.02 g | Theoretical Yield (moles) | 0.081 mol |
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September 12‚ 2012‚ from http://www.earlham.edu/~chem/chem111f03/labs/Experiment%2011.pdf/ The Synthesis of Apirin. (n.d.). Retrieved September 12‚ 2012‚ from http://www.reachoutmichigan.org/funexperiments/quick/csustan/aspirin.htm/ Excess and limiting Reagents. (n.d.). Retrieved September 14‚ 2012‚ from http://www.science.uwaterloo.ca/~cchieh/cact/c120/limitn.html
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Keywords acid value vegetable oils indirect titration A new method of acid value determination in vegetable oils has been developed. The method is based on (a) simple‚ rapid and complete extraction of acids from an oil test portion into reagent (0.05 mol dm–3 triethanolamine (B) in the mixture of 50 % H2O + 50 % 2-PrOH) and (b) indirect titration of acids in BH+ form against aqueous alkali in the presence of a phenolphthalein indicator. Suitable metrological parameters of acid value determination
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