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Chapter 14

Chapter 14 - Chapter 14 Chemical Equilibrium 1 The...

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Page 260 Chapter 14: Chemical Equilibrium 1. The equilibrium between carbon dioxide gas and carbonic acid is very important in biology and environmental science. CO 2 ( aq ) + H 2 O( l ) ° H 2 CO 3 (aq) Which one of the following is the correct equilibrium constant expression (K c ) for this reaction? A) [ ] [ ][ ] 2 3 c 2 2 H CO K CO H O = D) K c = 2 2 3 [CO ] [H CO ] B) K c = 2 2 2 3 [CO ][H O] [H CO ] E) K c = 2 3 1 [H CO ] C) K c = 2 3 2 [H CO ] [CO ] Ans: C Category: Easy Section: 14.1 2. Which is the correct equilibrium constant expression for the following reaction? Fe 2 O 3 (s) + 3H 2 (g) ° 2Fe(s) + 3H 2 O(g) 3. The equilibrium constant expression for the reaction 2BrF 5 (g) ° Br 2 (g) + 5F 2 (g) is 4. The following reactions occur at 500 K. Arrange them in order of increasing tendency to proceed to completion (least greatest tendency). 1. 2NOCl ° 2NO + Cl 2 K p = 1.7 × 10 – 2 2. 2SO 3 ° 2SO 2 + O 2 K p = 1.3 × 10 –5 3. 2NO 2 ° 2NO + O 2 K p = 5.9 × 10 –5 5. Consider the two gaseous equilibria: SO 2 (g) + 1 / 2 O 2 (g) ° SO 3 (g) K 1 2SO 3 (g) ° SO 2 (g) + O 2 (g) K 2 The values of the equilibrium constants K 1 and K 2 are related by A) K 2 = K 1 2 B) K 2 2 = K 1 C) K 2 = 1/K 2 1 D) K 2 = 1/K 1 E) none of these. Ans: C Category: Medium Section: 14.2

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