Reactingspecies caco3 cao co2 increased decreased

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Unformatted text preview: New Equil.: ¾¾ ® C’ + D’ ¬¾ ¾ decreased increased increased increased A’ < A B<B’<B* C’>C D’>D A’ + B’ 22 Chemistry 102 Chapter 14 EFFECT OF CONCENTRATION CHANGE ON EQUILIBRIUM In General: · Adding Reagent Ø Equilibrium always shift s in the direct ion that tends to reduce the concentration of the added reacting species. Ø When concentration of reactant is increased equilibrium shifts forward ( ¾¾ ) ® Ø When concentration of product is increased equilibrium shifts reverse ( ¬¾ ) ¾ · Removing Reagent Ø Equilibrium always shift s in the direct ion that tends to increase the concentration of the removed reacting species. Ø When concentration of reactant is decreased equilibrium shifts reverse ( ¬¾ ) ¾ Ø When concentration of product is decreased equilibrium shifts forward ( ¾¾ ) ® Example 1: H2 (g) + I2 (g) ¾¾ ® ¬¾ ¾ Starting conc’s 1.00 M 1.00 M Change: –0.79 M –0.79 M 2 HI (g) Equil Conc’s: 0.21 M Stress: Response: 0 + 1.58 M 0.21 M + 0.20M 1.58 M ­ Equilibrium shift s forward to use up added reactant H2 (g) New Equil. Conc’s: (700K) 0.15 M + I2 (g) ¾¾ ® ¬¾ ¾ 0.35 M 2 HI (g) 1. 70 M 0.21M<0.35 M<0.41 M 23 (700K) Chemistry 102 Chapter 14 Example 2: Cl2 (g) + ¾¾ ® 2 H2O (l) ¬¾ ¾ + HOCl (aq) + H3O (aq) + Cl- (aq) Reagent Species Change in concentration Cl2 increase Cl2 decrease H2O increase H2O decrease HOCl increase HOCl decrease – Cl increase – Cl Equilibrium Shift decrease Exam...
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