acetic anhydride with the use of the Fischer reaction. The set-up used was the reflux modified with a water bath at the constant temperature between 75-80oCelsius. The actual yield that was attained is 0.4271 grams of banana essence. The theoretical yield‚ on the other hand‚ was computed to be 2.98 grams. The percent yield was determined to be 14.33 %. Introduction Food chemistry that deals with the biological and non-biological components of food plays an important role in the food industry nowadays
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g 2.00 3.00 Calculations 1. Determine the limiting reagent for each trial. Show your calculations. (Hint: See the example in the Introduction.) Example: Trial 1: Note: These should be about the same and either CaCl2 or K2CO3 can be the limiting reagent depending on their initial masses. Trial 2: Table 3: Comparison of theoretical and actual yields for CaCO3 Trial # Limiting Reagent Theoretical Yield of CaCO3 Actual Yield of CaCO3 % Yield Trial 1 Trial 2
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aam Atomic Theories Dalton Thomson Rutherford Gold-Foil Experiment Shot alpha particles at gold foil; the particles either went straight through‚ or bounced back at large angles Atoms‚ Molecules‚ Formula Units‚ Mole‚ Mole Conversions‚ Percent Composition Identifying atoms‚ molecules‚ and formula units Atoms Molecules Formula units Understanding one mole
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Calculations: HNO3 (16M)- 0.15 mL* (0.016 mole/mL) = 0.0024 mole* (1000 mmol/mole) = 2.4 mmoles H2SO4 (18M)- 0.60 mL* (0.018 mole/mL) = 0.0108 mole*(1000 mmol/mole) = 10.8 mmoles Limiting Reagent Calculation: methylbenzoate - 2.0 mL*(1.088g/mL)/( 136.00g/mol)= 0.016 mol Methylbenzoate is limiting reagent because
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Introduction The objective of this project was to prepare tin tetraiodide through the following reaction: Sn+2I2∆SnI4 and to measure the melting point of tin tetraiodide. Tin tetraiodide was recrystallized after the synthesis. The percent yield and the theoretical yield of tin tetraiodide were calculated. Recrystallization is to further improve the purity of tin tetraiodide. The solvent is carefully chosen to be toluene in order to maximize the recovery of tin tetraiodide during recrystallization
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with achieving successful yields. Aspirin is synthesized from salicylic acid and acetic anhydride. Those two chemicals are mixed together along with sulfuric acid to form a crude solid. Filtration is used separate the impurities from the crude aspirin. To get purified aspirin‚ the precipitate was heated until all the excess had been removed. The end product is pure dry aspirin. Though there was too much room for error the yield percentage will almost never be a hundred percent. INTRODUCTION: In 1897
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in the nucleus of one atom of a particular element. Atomic Mass Unit (u) – a unit of mass that is 1/12 of the mass of carbon-12 atom; equal to 1.66 × 10-24 g. Isotopic Abundance – the relative amount of an isotope of an element; expressed as a percent or a decimal fraction. Average Atomic Mass – the average of the masses of all naturally occurring isotopes of an element weighted according to their abundance. Ex. Aam = (% abundance × mass) + (% abundance × mass) 100 4. Practice Problems
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Lab #3: Stoichiometry of a Precipitation Reaction October 14‚ 2014 Abstract: The purpose of the lab‚ Stoichiometry of a Precipitation Reaction‚ is to be able to calculate the amount of a second reactant we need to react with the reactant one. You must calculate the amount of the second reactant using stoichiometry to figure out what amount is needed. After the amount is calculated‚ you then can add it to the first reactant and it will give you a full reaction. To figure out what you
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theoretical yield of your product? Because we have a balanced 1:1 ratio and have 0.0068 mol of CaCl2 then we will get 0.0068 mol of CaCO3 which turns out to be 0.68g of CaCO3. 0.0068 mol CaCO3*100.09g/mol CaCO3 = 0.68 g CaCO3 B. According to your data table‚ what is the actual yield of the product? 0.6 grams CaCO3 (However the scale actually tipped 1.7g and 1.6g and finally settled on 1.6g) C. What is the percent yield? 0.6g CaCO3/0.68g CaCO3 = 0.88*100% = 88% yield D. A perfect percent yield
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of aniline with acetic anhydride. The crude acetanilide was dissolved in a solvent in a heated water bath. The solution was cooled slowly in an ice bath as crystals form out. As the compound crystallizes from the solution‚ the limiting reagent Aniline and the percent yield of 96% was obtained. Introduction: This experiment involves four functional groups common in organic chemistry. The substrate (reactants) which are Aniline and Acetic anhydride are both liquids and one of the products is solid
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