Lec-11-Chap14-3-Complete9/28/2009Chemical EquilibriumConcentrations at equilibrium. Le Chatelier’s Principle1Lec-11: Chemical EquilibriumChapter 141Chemical EquilibriumSo far we have learned:1. How to determine the equilibrium constant Kcfrom initial and equilibrium concentrations.2. How to determine, given initial concentrations of the reactants and the products, the direction in which the reaction will proceed.C+D+A+B+abcd DABCcdabcKthe equilibrium constant expressionisFor a reactionWe now consider how to find the composition of a reaction system at equilibrium, given that Kcand the initial concentrations are given.2
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