Green Chemistry Institute Atom Economy Page 1 American Chemical Society --------------------------------------------------------------------------------------------------------------------- CLEANING UP WITH ATOM ECONOMY By Kathryn E. Parent‚ k_parent@acs.org Introduction Cleaning up the environment and‚ more importantly‚ preventing pollution are important issues in today’s world. The theme for the 2002 National Chemistry Week is “Chemistry Keeps Us Clean.” While the chemical industry is traditionally
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Experiment 1: Calorimetry INTRODUCTION In the calibration of the calorimeter‚ the net ionic equation used is H+(aq) + OH-(aq) H2O(l). The reaction released heat and is said to be exothermic. HCl is the limiting reactant of the reaction and o.oo5 moles of it was used. The heat generated by the reaction is 55.8 kJ. The sign of T of the reaction used for calibration is opposite to that of H. In the determination of heats of reaction‚ the reaction of 15 mL 1 M CuSO4 + 0.05 g Zn produced a
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nitrate reagent. We are comparing these by seeing how they react and if there is no reaction after 5 minutes we will place the test tubes in a beaker of water that is heated at a temperature of 70oC-80oC and observe what happens. Experimental Stoichiometry Compound | Molecular Weight | Quantity | Moles |
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STOICHIOMETRY OF GASOLINE. AN INTRODUCTION The internal combustion engines burn fuel to create kinetic energy. The burning of fuel is basically the reaction of fuel with oxygen in the air to form water and Carbon dioxide as the major end product . The amount of oxygen present in the cylinder is the limiting factor for the amount of fuel that can be burnt that is to say it determines the level of burning in our combustion engine. If there’s too much fuel present‚ not all fuel will be burnt and un-burnt
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one mark‚ some questions will have a total value of two marks. Note that there are MORE terms provided than you need‚ so read over the list carefully and choose the terms you want to use. The same term may be used more than once in this section. Stoichiometry (4 marks) 1. The calculated amount of product formed during a reaction is called the ____________________ yield. Theoretical 2. For a given chemical reaction‚ the actual yield is always ____________________ than the theoretical yield. Less / smaller
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Co(acac)3 + 2 C2H3O2NO2 ( 2/3 Co(acac-NO2)3 + 2 C2H3O2 • Moles of reagent used - Cu(NO3)2·3H2O‚ MW: 241.59 g/mol [pic] - Acetic anhydride‚ MW: 102.1 g/mol‚ D: 1.080 g/mL [pic] - Co(acac)3‚ MW: 356.24 g/mol [pic] • Limiting Reagent From the stoichiometry of the reactions‚ acetic anhydride is in excess‚ and 2/3 (0.67) mole Co(acac)3 should reaction with 1 mole copper nitrate trihydrate. The actual mole ratio when 0.49 g Co(acac)3
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100 Weight of the of 500ml RB flask before addition of sample: 206.43g Weight of 500ml RB flask after addition of sample solution: 212.79g Weight of sample = 212.79 – 206.43 = 6.36g Theoretical yield is calculated with the aid of a balanced stoichiometry of the reaction. 1. Theoretical yield of methyl salicyl weight of salicylic acid taken: 14g Moles of salicylic acid: 14.g/138 = 0.10moles Mass of methanol = Volume of methanol X Density of methanol. Volume of
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Chapter 4 Fundamentals of Material Balances Material Balance-Part 1 Process Classification 3 type of chemical processes: 1. Batch process – Feed is charge to the process and product is removed when the process is completed – No mass is fed or removed from the process during the operation – Used for small scale production – Operate in unsteady state March 31‚ 2009 ChE 201/shoukat@buet.ac.bd 2 Process Classification 2. Continuous process – Input and output is continuously
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Chem 121L Part I: Introduction Stoichiometry is the study of the quantitative‚ or measurable‚ relationships that exist in chemical formulas and also chemical reactions. In this experiment hydrogen gas will be produced from the reaction of a known mass of magnesium metal with an excess of hydrochloric acid. The theoretical number of moles of hydrogen gas may be calculated using stoichiometry and the balanced chemical equation. The theoretical volume of hydrogen gas may then be determined from
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Isoamyl Acetate Synthesis through Fischer Reaction Lesaca‚ Anna*‚ Lopez‚ Maria Flor‚ Lu‚ Ricardo‚ Magdurulan‚ Tricia 2Biology6‚ Department of Biology‚ College of Science‚ UST‚ Manila annalesaca@yahoo.com Abstract Esters are a type of functional group that causes distinguishable flavors or odors of some fruits. It can be synthesized by Fischer reaction‚ which is an acid-catalyzed reaction of an alcohol and carboxylic acid. One of the esters known for its characteristic banana flavor is the isoamyl
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