key2 - CHEM 1212 Test II MULTIPLE CHOICE. Choose the one...

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CHEM 1212 Test II MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) At 1000 K, the equilibrium constant for the reaction is K p = 0.013. 2NO (g) + Br 2 (g) ' 2NOBr (g) Calculate K p for the reverse reaction, 2NOBr (g) ' 2NO (g) + Br 2 (g). A) 1.6 x 10 -4 B) 0.013 C) 77 D) 0.99 E) 1.1 2) Consider the following chemical reaction: H 2 (g) + I 2 (g) ' 2HI (g) At equilibrium in a particular experiment, the concentrations of H 2 , I 2 , and HI were 0.15 M, 0.033 M, and 0.55 M, respectively. The value of K eq for this reaction is __________. A) 6.1 B) 111 C) 61 D) 23 E) 9.0 x 10 -3 3) The K eq for the equilibrium below is 7.52 x 10 -2 at 480 o C. 2 C l 2 (g) + 2H 2 O (g) ' 4HCl (g) + O 2 (g) What is the value of K eq at this temperature for the following reaction? 4HCl (g) + O 2 (g) ' 2Cl 2 (g) + 2H 2 O (g) A) 0.150 B) 0.0752 C) -0.0752 D) 5.66 x 10 -3 E) 13.3 4) The following equilibrium is readily established: S O 2 Cl 2 (g) Æ SO 2 (g) + Cl 2 (g) At equilibrium at 373 K, a 1.00-L reaction vessel contains 0.0106 mol of SO 2 Cl 2 and 0.0287 mol each of SO 2 and Cl 2 . What is K eq for the reaction at 373 K? A) 0.0777 B) 2.72 C) 12.8 D) 2.39 E) 0.418 5) Acetic acid is a weak acid that dissociates into the acetate ion and a proton in aqueous solution: H C 2 H 3 O 2 (aq) ' C 2 H 3 O 2 - (aq) + H + (aq) At equilibrium at 25 o C a 0.100 M solution of acetic acid has the following concentrations: [HC 2 H 3 O 2 ] = 0.0990 M, [C 2 H 3 O 2 - ] = 1.33 x 10 -3 M, and [H+] = 1.33 x 10 -3 M. The equilibrium constant, K eq , for the ionization of acetic acid at 25 o C is __________. A) 5.71 x 10 6 B) 0.100 C) 1.75 x 10 -7 D) 1.79 x 10 -5 E) 5.71 x 10 4 6) The equilibrium constant for the interconversion of PCl 5 and PCl 3 is 0.0121: P C l 5 (g) ' PCl 3 (g) + Cl 2 (g) A vessel is charged with PCl 5 , giving an initial pressure of 0.123 atm. At equilibrium, the partial pressure
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This note was uploaded on 11/16/2011 for the course CHEM 1212k taught by Professor Wood during the Spring '08 term at Valdosta State University .

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key2 - CHEM 1212 Test II MULTIPLE CHOICE. Choose the one...

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