Chem 162 Fall 05

Chem 162 Fall 05 - Chemistry 162 Final Exam December 19,...

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Chemistry 162 Final Exam December 19, 2005 Student Name: ____________________________ Recitation Section Number: ______ Recitation Instructor: _______________________ The exam has 42 questions for credit and an additional one to check the color of your exam booklet. Please answer all 43 questions on the OpScan sheet . There is no penalty for guessing. At the end of the 180-minute exam period, please hand in only your OpScan form. If you finish early, please do not disturb your fellow students. A proctor will check your picture-ID, OpScan form, signature and collect this cover sheet during the exam. Exam scores and course grade will be posted as soon as possible. ON THE OpScan FORM: [Use a Number 2 Pencil or Darker] SEC. PER. INST. (1) SIGN your name across the TOP of the form. 01 T6 BOB (2) Code ONLY the following information: [ blacken circles] 02 T6 JUDY (a) Your Name… LAST NAME FIRST 04 TH6 BOB [ Blank space between last and first names] 06 TH6 JUDY (b) Your SOCIAL SECURITY NUMBER [Start under Box A and continue to Box I ] 07 T8 JUDY (c) Your RECITATION SECTION NUMBER [Boxes K & L ] 08 T8 BOB [Sections 01 – 08, code the zero under Box K ] (d) Your EXAM FORM NUMBER [Box P ] Your EXAM FORM is: 1 See last page of exam for physical constants, periodic table, and other information. 162 EXAM FINAL EXAM FALL 2005 1
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1. In which of the following groups of substances do solely London forces exist. W . K r X . C O 2 Y. CCl 4 Z . H 2 O A. X and Y only B. W and X only C. All of them D. W, Y, and Z E. W, X, and Y 2. At equilibrium for a reaction the following is observed: P CO = 2P CO 2 = 2.50 atm Calculate K p for the reaction: 2CO(g) CO 2 (g) + C(s) A. 0.133 B. 3.60 C. 1.60 D. 0.590 E. 0.200 3. For which one of the following reactions is K c = K p ? A. CH 4 (g) + 2O 2 (g) CO 2 (g) + 2H 2 O(g) B. NH 3 (g) + HCl(g) NH 4 Cl(s) C. 2NO 2 (g) N 2 (g) + 2O 2 (g) D. H 2 (g) + I 2 (s) 2HI(g) E. PCl 5 (s) PCl 3 ( l ) + Cl 2 (g) 4. Which one of the following salts is most soluble in H
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CuI K sp = 5.1 x 10 -12 B. AgCl K sp = 1.8 x 10 -10 C. PbF 2 K sp = 3.7 x 10 -8 D. CaSO 4 K sp = 2.4 x 10 -5 E. PbCl 2 K sp = 1.6 x 10 -5 5. Balance the following half-reaction under basic conditions and indicate the coefficient of water and the side of the reaction to which it is added. H C H O + M n O 2 MnO 4 - + CH 3 OH A. 2, left B. 2, right C. 1, right D. 4, left E. 3, left 6. What is the half-reaction at the cathode in the following voltaic cell? Fe(s) Fe 3+ (aq) ⏐⏐ Cr 2 O 7 2- (aq), Cr 3+ (aq) Pt(s) A. Fe 3+ (aq) + 3e - Fe(s) B. Fe(s) Fe 3+ (aq) + 3e - C. Cr 2 O 7 2- (aq) + 14H + (aq) + 6e - 2Cr 3+ (aq) + 7H 2 O( ) l D. 2Cr 3+ (aq) + 7H 2 O( l ) Cr 2 O 7 2- (aq) + 14H + (aq) + 6e - E. Cr 2 O 7 2- (aq) + Pt(s) Pt(CrO 4 ) 3- (aq) + Cr
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Chem 162 Fall 05 - Chemistry 162 Final Exam December 19,...

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