mechanism. A small amount of 1‚4-dimethoxybenzene was dissolved in acetic acid and t-butyl alcohol‚ along with H2SO4. The reaction was then allowed to go to completion at room temperature‚ and the crystals were washed with water and methanol. The percent yield of the product was 57.48%. This was lower due to the fact that many of the crystals were stuck in the reaction tube and could not be removed for weighing. Also‚ when a Pasteur pipet was used to remove the solvent from the reaction tube‚ many crystals
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Calculation molecular weight mw Molar mass of compound Number particles = NA x n Mass % Determination of empirical formula and molecular formula Combustion analysis Balancing equations Chapter 4 Limiting reactant Mole to mole conversion from reaction stoichiometry Theoretical yield‚ Percent yield‚ Actual yield Solution concentration (molarity) M = n/V ‚ V always in L M1V1=M2V2 ( dilution calculations) Stoichiometry of reactions in solutions M1V1=M2V2 ( dilution calculations) Ionic reactions (formula
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a bond is repaid is called the: C. maturity. 4. The rate of return required by investors in the market for owning a bond is called the: D. yield to maturity. 5. The annual coupon divided by the face value of a bond is called the: E. coupon rate. 6. The annual coupon payment divided by the market price of a bond is called the: B. current yield. 7. An indenture is: E. the written agreement between the bond issuer and the bondholders which details the terms of the debt issue. 8. A bond
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the product kept sticking to the sides of the tube. This may not be a property of the compound though it’s possible it could be a result of incomplete drying. The melting point range of the product was 246-249 C. D. Weight and Percent Yield of Product: -The weight of the final product is .898g - .5g =
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in an ice bath. Pure acetanilide was the product after the second crystrallization which was obtained by finally removing the impurities through filtration. The computations performed in this experiment are determining the limiting reagent‚ theoretical yield and percent yield. INTRODUCTION Impurities are common in compounds most especially organic ones that came from natural origin. There can be combinations of soluble‚ insoluble and colored impurities. Recrystallization is the most important
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the reactants in an inert solvent with its boiling point. Another highlight of this experiment is the liquid-liquid extraction wherein a solution containing a mixture of compounds is shaken with a second solvent that is immiscible with it. The percent yield calculated was 59.23%. The characteristics of the synthesized ester were liquid‚ oily‚ and it had a banana smell. Introduction Artificial flavoring is commonly used in the food that we eat today. For example‚ fruit flavoring is a chemical mixture
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responsible for the smell of bananas. However‚ when Isopentyl acetate is treated with H3O+ it will hydrolyze back into the carboxylic acid‚ which will change the fragrance. In this experiment 3.11g of Isopentyl Acetate were produced with a 51.92 percent yield. Introduction Esters are carboxylic acid derivatives in which the acyl carbon bears an ether group instead of the hydroxy group. Esters are synthesized by different methods such as an Sn2 process where a carboxylic acid is treated with a strong
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The electrophillic addition of the nitronium ion to methyl benzoate made the formation of the nitronium ion. AS shown on the mechanism is shown below‚ the carbonmethoxy group directs the nitronium ion to a position of meta. For example‚ formation of carbonation intermediate yields a resonance stabilized structure of the proton. NO2 H3CO O H3CO O H3CO O H3CO O O N O NO2 H NO2 NO2 NO2 H H3CO O H3CO O HSO4 NO2 NO2 H2SO4 Procedure: The procedure is outlined is “the laboratory Manual for Organic
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Stoichiometry Section 11.1 What is stoichiometry? In your textbook‚ read about stoichiometry and the balanced equation. For each statement below‚ write true or false. _______true___________ 1. The study of the quantitative relationships between the amounts of reactants used and the amounts of products formed by a chemical reaction is called stoichiometry. ________true__________ 2. Stoichiometry is based on the law of conservation of mass. _________false_________ 3. In any chemical reaction‚ the
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2:1 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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