Equilibrium problems.pdf - Equilibrium Practice Problems IB 1 ChemistrySL\/HL Writing Equilibrium Constant Expressions(Kc 1 Write the equilibrium

Equilibrium problems.pdf - Equilibrium Practice Problems IB...

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Equilibrium Practice Problems IB 1 Chemistry—SL/HL Writing Equilibrium Constant Expressions (K c ): 1. Write the equilibrium constant expression for the following homogeneous reactions: a. 2H2O2(g) ÅÆ2H2O (g) + O2(g) b. CuCl42-(aq) ÅÆCu2+(aq) + Cl-(aq) c. CO (g) + H2O (g) ÅÆCO2(g) + H2(g) Extent of Reaction and Kc:2. Discuss the extent of reaction with regards to the value of Kcfor the following reactions: a. 3H2(g) + N2(g) ÅÆ2NH3(g) Kc= 1.7 x 10b. 2NO2(g) ÅÆN2O4(g) Kc= 170 c. 2NO (g) + O2(g) ÅÆ2NO2(g) Kc= 1.20 d. COBr2(g) ÅÆCO (g) + Br2(g) Kc= 0.190 -4 Prediction of Equilibrium Change (Le Chatelier’s Principle): 3. Predict the direction of the equilibrium shift when the following changes are made to this reaction at equilibrium: 2NOBr (g) ÅÆ2NO (g) + Br2(g) Kc= 0.16 H = -344 kJ a. Addition of more Brb. Removal of some NOBr c. Increase in the container volume (at constant temperature) d. Decrease in temperature 4. Consider the system: SO3(g) ÅÆSO2(g) + ½ O2(g) H = + 98.9 kJ How will the yieldof sulphur dioxide be affected by the following changes? 2 a.
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