Quiz9cor_E - 1 CHM 2123, Quiz #9: Fischer Esterification...

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1 CHM 2123, Quiz #9: Fischer Esterification Assigned: November 12, 2009 Due: November 17, 2009, before 5pm MARKING SCHEME Note to all Students : In the lab manual, p. XX, “Le Hotelier’s Principle” should actually be “Le Châtelier’s Principle”, a concept you have no doubt seen in General Chemistry. 1. Give the equation for the Equilibrium constant of a standard esterification, along with a brief but clear definition. (3 points) The Equilibrium constant is a value representing the ratio of concentrations of the products to the reactants (1), for a reaction having reached its thermodynamic equilibria (1). In the Fischer esterification, this equation is: K = [ester][H 2 O] (1) [acide][alcool] 2. To achieve an efficient reaction in the Fisher esterification, it is necessary to push the equilibrium towards the products. Suggest two approaches by which this could be accomplished. Indicate which one can push the equilibrium completely (100%) to the right and explain why it does so. ( 2.5 points
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Quiz9cor_E - 1 CHM 2123, Quiz #9: Fischer Esterification...

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