In this experiment‚ the production of a Grignard reagent (phenylmagnesium bromide) was performed from a bromobenzene reactant combined with magnesium and ether. Phenylmagnesium bromide was then transformed into a tertiary alcohol called triphenylmethanol‚ through addition of another compound called benzophenone‚ as well as additional ether. The end product of triphenylmethanol was analyzed via NMR and IR. Figure 1: Preparation of the Grignard agent by combining bromobenzene with magnesium and ether
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carbonate. The resulting products were solid calcium carbonate and aqueous sodium nitrate (equation 1). To calculate the theoretical yield‚ the moles of sodium carbonate and calcium nitrate were calculated to find the limiting reagent. Then the moles of the limiting reagent (calcium nitrate) were used in ratio with the precipitate ( 1:1)‚ calcium carbonate‚ to find how many moles of the solid were produced‚ then to conclude the mass of the precipitate (equation 2). The percent yield was calculated
Free Stoichiometry Chemical reaction Sodium
confirmed the identity of benzylic acid with two OH peaks and the carbonyl peak. Introduction The purpose of this experiment was to synthesize benzilic acid from benzoin. Part A was omitted from the experiment and benzoin became the starting reagent. For this experiment a multistep synthesis was required. In the first part (Part B) benzoin was oxidized using nitric acid to make benzyl as a product. This reaction is characterized by the orange gas of nitrogen oxide that is liberated as a byproduct
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enthalpy‚ heat of reaction‚ and the heat of the calorimeter is: Ccal=qcal∆T qrxn=nLR x ∆H The students are the ones responsible in preparing their own solution. Inside the test tube the students put the reagents used for calibration to determine the heat capacity of the calorimeter. These reagents are: sodium hydroxide and HCl. Then the students measure the temperature with 15 seconds intervals. The students made two trials and determine the change in temperature which is needed for the calculations
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Designation: D2972 – 08 Standard Test Methods for Arsenic in Water1 This standard is issued under the fixed designation D2972; the number immediately following the designation indicates the year of original adoption or‚ in the case of revision‚ the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval. 1. Scope 1.1 These test methods2 cover the photometric and atomic
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of Reagents: Compound (g) Molecular Weight (g/mol) Grams (g) Moles 6 mL of 2-methylcyclohexanol (C7H14O) 114.19 g/mol 6 mL x 0.943g = 5.66 g 1 mL 5.66 g x 1mol = .0496 mol 114.19 g 5 mL of 85% phosphoric acid (H3PO4) 98.0 g/mol 5 mL x 2.01 g = 10.05 g 1 mL 10.05 g x 1mol = .1026 mol 98.0 g Drying Agent Sodium Sulfate Na2SO4 142.04 g/mol Ice Water Bath (H2O) Boiling Stone The reagents are to be in a 1:1 molar ratio. The limiting reagent is 2-methylcyclohexanol
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equilibrium constant‚ Keq‚ of the Fe3+(aq)+SCN-(aq)↔ FeSCN2+(aq) reaction. By determining the amount of light absorbed‚ the concentration of the colored FeSCN2+ solution was also quantitatively determined. From that data‚ the concentrations of the reagents at equilibrium may also be determined. This experiment should thus provide a Keq value without computing for the concentration of each of the species in the reaction. This experiment will only deal with the aspect of chemical equilibrium‚ particularly
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Food Fermentation Microbiology sasimalani@msu.edu.my INTRODUCTION • Industrial microbiology uses microorganisms‚ typically grown on a large scale‚ to produce valuable commercial products or to carry out important chemical transformations. • This process is commonly referred to as Fermentation DEFINITION OF FERMENTATION “The process of deriving energy from the oxidation of organic compounds‚ such as carbohydrates‚ using an endogenous electron acceptor‚ which is usually an organic
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7e- ^ the 13 on C is mass number. = # protons + # neutrons. 3. N2 + 2 O2 + Cl2 -> 2 NO2 Start with 6 mol N2‚ 4 mol O2‚ 4 mol Cl2‚ Find limiting reagent and amounts remaining of excess reactants N2 + 2 O2 + Cl 2 6 mol 4 mol 4 mol start Max yield x (2mol No‚Cl/ 1 mol N2) Of No2Cl = 12 mol 4 mol 8 mol O2 is the limiting reagent. 4 mol of NO2Cl (4 mol NO2Cl) (1 mol N2 / 2mol No2Cl) = 2 mol N2 consumed 6 mol N2 – 2 mol N2 = 4 mol N2 left ^at start ^ used up (4 mol NO2Cl) (1 mol
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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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