Le-Chatelier-principle

Le-Chatelier-principle - Le Chteliers principle The...

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Le Châtelier’s principle
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The significance of Kc values Read 14.6 (560 - 561) do PE5 If Kc is small (0.001 or lower), [products] must be small, thus forward reaction is weak If Kc is large (1000 or more), [products] must be large, thus forward reaction is strong [Products] Kc = [Reactants] Reactants Products If Kc is about 1, then reactants and products are about equal but not exactly since they may be raise to different exponents
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Altering the straw lab Recall the lab with large and small straws Q - Predict what will happen when: 5 ml is added to GC2 at 15 transfers, and then 10 ml is removed from GC1 at 20 transfers The volumes stopped changing at 30, 20 mL Volume # of transfers 15 20 30 20
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Stresses to equilibria Changes in reactant or product concentrations is one type of “stress” on an equilibrium Other stresses are temperature, and pressure. The response of equilibria to these stresses is explained by Le Chatelier’s principle: If an equilibrium in a system is upset, the system will tend to react in a direction that will
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This note was uploaded on 04/12/2011 for the course CHEM 1010 taught by Professor Marshall during the Spring '11 term at North Texas.

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Le-Chatelier-principle - Le Chteliers principle The...

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