10462ndspring2011f5

10462ndspring2011f5 - GeneralChemistryI exam2 Form 5...

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General Chemistry I exam 2 10/20/2011 R. Lopez de la Vega Name_____________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The equilibrium constant is given for one of the reactions below. Determine the value of the missing equilibrium constant. H 2 (g) + Br 2 (g) 2 HBr(g) K c = 3.8 × 10 4 2 HBr(g) H 2 (g) + Br 2 (g) K c = ? A) 5.3 × 10 - 5 B) 1.9 × 10 4 C) 2.6 × 10 - 5 D) 6.4 × 10 - 4 E) 1.6 × 10 3 1) 2) Calculate the pH of a solution that contains 2.4 × 10 - 5 M H 3 O at 25°C. A) 4.17 B) 4.62 C) 9.38 D) 11.60 E) 2.40 2) 3) Consider the following reaction at equilibrium. What effect will reducing the volume of the reaction mixture have on the system? CuS(s) + O 2 (g) Cu(s) + SO 2 (g) A) The equilibrium constant will decrease. B) The reaction will shift to the left in the direction of reactants. C) The reaction will shift to the right in the direction of products. D) The equilibrium constant will increase. E) No effect will be observed. 3) 4) In which of the following reactions will K c = K p ? A) N 2 (g) + 3 H 2 (g) 2 NH 3 (g) B) CH 4 (g) + H 2 O(g) CO(g) + 3 H 2 (g) C) CO(g) + 2 H 2 (g) CH 3 OH(g) D) H 2 (g) + I 2 (g) 2 HI(g) E) N 2 O 4 (g) 2NO 2 (g) 4) 5) Which of the following is TRUE? A) A basic solution does not contain H 3 O + B) An acidic solution has [H 3 O ] > [OH ] C) An neutral solution does not contain any H 3 O + or OH - D) A neutral solution contains [H 2 O] = [H 3 O ] E) None of the above are true. 5) 6) The equilibrium constant is equal to 5.00 at 1300 K for the reaction: 2 SO 2 ( g ) + O 2 ( g ) 2 SO 3 ( g ). If initial concentrations are [SO 2 ] = 3.60 M, [O 2 ] = 0.45 M, and [SO 3 ] = 5.40 M, the system is A) at equilibrium. B) not at equilibrium and will shift to the left to achieve an equilibrium state.
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10462ndspring2011f5 - GeneralChemistryI exam2 Form 5...

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