Mock_Exam_II_(14-16)

# Mock_Exam_II(14-16) - Exam II 1 Suppose 2.00 mol H2(g and 1.00 mol of I2(g are placed in a 1.00 L container and they react to form HI(g At

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1. Suppose 2.00 mol H2(g) and 1.00 mol of I2(g) are placed in a 1.00 L container, and they react to form HI(g). At equilibrium, it is found that 1.80 moles of HI are present in the container. Calculate K for the reaction. a. 57.5 b. 29.5 c. 82.2 d. 40.1 e. 17.8 2. Pyridine is a weak base having a Kb = 1.4e-9. What is the pH of a solution prepared by adding 0.060 moles of pyridine (C5H5N) in a total of 250.0 mL of aqueous solution? a. 9.26 b. 8.85 UNSURE c. 10.42 d. 11.08 e. 11.52 3. W hen I2(s) is added to water, a saturated solution at equilibrium results. The dissolved iodine imparts a gold color to the water. After equilibrium is established, some radioactive solid iodine is added to the solution. After a period of time, the solution remains saturated and the intensity of the gold color in the solution remains the same. When the solution is tested, it is found that some of the radioactivity is now in the solution as well as in the solid. What does this experiment indicate about the equilibrium? a. The rate of dissolving is greater than the rate of crystallizing b. The rate of crystallizing is greater that the rate of dissolving c. After equilibrium is established, no further solid iodine dissolves d. The rates of dissolving and crystallizing both approach zero e. The iodine continues to dissolve and crystallize at equal rates 4. Solid NH 4 CO 2 NH 2 is placed in a container and decomposes into NH3 and CO2 to reach equilibrium. Kp for this is 0.45. At equilibrium, what is the partial pressure of CO2 in the container? a.

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## This note was uploaded on 04/05/2008 for the course CHEM 161, 101 taught by Professor Hansell during the Spring '08 term at Rutgers.

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Mock_Exam_II(14-16) - Exam II 1 Suppose 2.00 mol H2(g and 1.00 mol of I2(g are placed in a 1.00 L container and they react to form HI(g At

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