Chem4_12_Fall2007_PracticeExam1_ICON

Chem4_12_Fall2007_PracticeExam1_ICON - CHEM 4:012...

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CHEM 4:012 PRINCIPLES OF CHEMISTRY II EXAM #1 Fall 2007 Practice Test Equations and Constants R = 0.08206 L·atm/mol·K = 8.314 J/mol·K P A = i · X A ·P ° A Δ T f = K f · m For water: K b = 0.51 ° C/ m ; K f = 1.86 ° C/ m Δ T b = i ·K b · m Π = i · M ·R·T 1 atm = 760 torr (solubility) gas = k H · P gas t k [A] 1 [A] 1 o t + = o 1/2 k[A] 1 t = t k o [A] t [A] ln = k ln(2) t 1/2 = T 1 T 1 R E k k ln 1 2 a 2 1 = m k π ν 2 1 = ) ln( RT E ln(k) a A + = /RT) a (-E e k A = 1. The reaction 2H 2 O 2 Æ 2H 2 O + O 2 has the following mechanism: H 2 O 2 + I - Æ H 2 O + IO - H 2 O 2 + IO - Æ H 2 O + O 2 + I - The catalyst in this reaction is? A) H 2 O B) I - C) H 2 O 2 D) IO - E) O 2 2. Duroplast is a polymer material that is much stronger than steel and was used to construct the outer body of an eastern European automobile called the Trabant. Disposing of old Trabant bodies is problematic because the Duroplast cannot be recycled or reshaped and produces toxic fumes when burned. Based on this information, Duroplast can best be described as A) an elastomer. B) an addition polymer. C) a thermoplastic. D) a thermoset. E) a copolymer
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2 3. Two aqueous solutions are prepared: 1.00 m Na 2 CO 3 and 1.00 m LiCl. Which of the following statements is true? A) The Na 2 CO 3 solution has a higher osmotic pressure and higher boiling point than the LiCl solution. B) The Na 2 CO 3 solution has a higher osmotic pressure and higher vapor pressure than the LiCl solution. C) The Na 2 CO 3 solution has a lower osmotic pressure and higher boiling point than the LiCl solution. D) The Na 2 CO 3 solution has a lower osmotic pressure and lower vapor pressure than the LiCI solution. E) None of the above statements is true. 4. If a fire starts in a small reaction vessel, what should be done to quickly extinguish the flames? A) Quickly carry the vessel into a fume hood. B) Cover the vessel with a watch glass or larger beaker. C) Pour water over the flames. D) Call the fire department. E) Yell “Fire! Fire!” while running to get your TA. 5. An organic amide can be prepared by reaction of A) an ester and a tertiary amine B) an aldehyde and ammonia C) a ketone and ammonia D) a carboxylic acid and a primary amine E) a carboxylic acid and a tertiary amine 6. A scientist is studying the chemical reaction of bromate with water: BrO 3 - + 5Br - + 6H + Æ 3Br 2 + 3H 2 O and collects the following rate data (concentration is in molarity): Experiment Initial
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This note was uploaded on 03/27/2008 for the course CHEM 4:12 taught by Professor Larsen during the Spring '08 term at University of Iowa.

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Chem4_12_Fall2007_PracticeExam1_ICON - CHEM 4:012...

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