Williams Exam 2 Version D

Williams Exam 2 Version D - Georgia Institute of Technology...

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Exam #2, Version D Page 1 Georgia Institute of Technology CHEM 1310: Exam II October 21, 2009 Select the best answer for each of the following problems. Each problem is worth 5 points with no partial credit. 1. A solution is prepared by dissolving 49.3 g of KBr in enough water to form 473 mL of solution. Calculate the mass percentage of KBr in the solution if the density is 1.12 g/mL. A. 10.1% B. 9.3% C. 11.7% D. 8.6% E. 10.4% Answer: B 2. Which of the following acid-base reactions will have the largest equilibrium constant? A. NH 3 + HCN B. NH 3 + H 2 O C. NH 3 + HClO 2 D. NH 3 + HClO E. NH 3 + CH 3 COOH (Acetic Acid) Answer: C 3. Which of the following has the greatest concentration of hydroxide ions? A. Apple Juice (pH = 3.1) B. Orange Juice (pH = 2.5) C. Coca-Cola (pH = 3.8) D. Lemon Juice (pH = 2.1) E. Milk (pH = 6.4) Answer: E
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Exam #2, Version D Page 2 4. What is the conjugate acid of HPO 4 2- ? A. H 2 O B. PO 4 3- C. H 3 O + D. H 2 PO 4 - E. OH - Answer: D 5. Determine the volume of SO 2 (at STP) formed from the complete reaction of 96.7 grams of FeS 2 (molecular weight = 119.99 g/mol) and 55.0 L of O 2 (398 K, 1.20 atm). 4 FeS 2 (g) + 11 O 2 (g) 2 Fe 2 O 3 (s) + 8 SO 2 (g) A. 27.6 L B. 36.1 L C. 18.1 L D. 32.9 L E. 45.3 L Answer: D 6. Consider the following reaction and its equilibrium constant: SO 2 (g) + NO 2 (g) SO 3 (g) + NO (g) K = 0.33 A mixture of the four gases has the following partial pressures: P (SO 2
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Williams Exam 2 Version D - Georgia Institute of Technology...

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