10-24 - Le Chatelier's Principle When a system at...

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Section 9.12 Le Chatelier’s Principle Adding is like pushing Add reactant: R P Add product: R P R P Remove product: Removing is like pulling Remove reactant: R P When a system at equilibrium is placed under a stress, it will respond so as to appear to relieve the stress. http://www.youtube.com/watch?v=f9aTOSpkUng
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Le Chatelier’s Principle CH 3 I + OH 1- I 1- + CH 3 OH + E Stress: [OH 1- ] CH 3 I + OH 1- I 1- + CH 3 OH + E CH 3 I decreases I -1 , CH 3 OH, E increase (rxn gets hotter) System reacts to decrease OH -1   As a result: Section 9.12 (exothermic rxn) When a system at equilibrium is placed under a stress, it will respond so as to appear to relieve the stress.
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Le Chatelier’s Principle CH 3 I + OH 1- I 1- + CH 3 OH + E When a system at equilibrium is placed under a stress, it will respond so as to appear to relieve the stress. Exothermic rxn: think of E as a product Endothermic rxn: think of E as a reactant Stress: T ( i.e., add E) CH 3 I + OH 1- I 1- + CH 3 OH + E + E I 1- + CH 3 OH CH 3 I +OH 1- [CH 3 OH] E OH 1- , CH 3 I I 1- , CH 3 OH Reaction Coordinate TS K K Section 9.12
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Le Chatelier’s Principle CH 3 I + OH 1- I 1- + CH 3 OH + E K K (remains the same) (remains the same) 1 M 1 M 10 M 10 M K = 100/ 1 -x -x +x +x .65 M 1.65 M 10.35 M 10.35 M K = 100/ 1 Section 9.12 At Equilibrium - - 1 I H H H H 2 M 1 M 10 M 10 M C 3 + O I 1 + C 3 O + E System Stressed by adding 1 M OH 1- CH 3 I + OH 1- I 1- + CH 3 OH +E System corrects by draining off some OH 1-
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H<0 pink blue What color will the reaction be when HCl is added? What color will the reaction be when water is added?
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10-24 - Le Chatelier's Principle When a system at...

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