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Download Midterm Exam Solutions - General Chemistry II - Fall 2003 | CHEM 113 and more Exams Chemistry in PDF only on Docsity!
_xamEOS. html Page 1 of 3 C113 PRACTICE EXAM - End of Semester Fall 2003 1. Which of the following is true for an electrochemical cell at equilibrium? (a) E=E° E=0 (c) both describe a cell at equilibrium (d) neither describes a cell at equilibrium 2. Write the equation for the yoltaic cell reaction that occurs under standard state conditions for a cell consisting of Ni/Ni2* and AVAP™. (a) 3 Niz*(aq) + 2 AP*(aq) -> 3 Ni(s) + 2 Alls) (b) 2 Al(s) + 3 Ni(s) -> 2 AB* (aq) + 3 Ni2*(aq) (c) 3 Nis) + 2 AP*{aq) --> 3 Ni2*(aq) + 2 Al(s) @2Al@) +3 Ni2*(aq) ~> 2 AP*(aq) + 3 NiG) 3. Calculate the mass of aluminum that is produced by electrolysis of molten AICL, when an electrical er current of 1.0 A is passed through the cell for 15 minutes. iS 6 op 2 100% y Gavan (a) 0.79 g (b)3.5x 102 g © 8.4x 107 g (48 soot Senge” GF legal x Koby, &) Fre T pict 4. Which of the following substances will oxidize Al but not Co? . _e QR Zn (c) Ba" (d) Cly Ea Cats Coty, 3 Gy “+277 5. Calculate cae of the equilibrium constant for the following reat 25°C. 2Crfs) + 3Zn?*(ag) > 2 Cr’*(aq) + 3 Zn(s) Eo 2 EE log K @ixie ® F103 2x1? wox? & fob (hom) <.3-C) 67.023 « 6. Which of the following is the formula of a saturated hydrocarbon? K 493g ke gee @ CH, ‘ (b) CsHg (c) CoH (d) all of the above are saturated hydrocarbons (e) none of above are saturated hydrocarbons 4. Which of the following substances is the strongest oxidizing agent? (a)Na* (by Al DCA (A) Ni a von kd 8. Calculate the emf for the following cell at at 25k god the conditions specified. Q = toe] 2 fis) 3 Fe2*(aq, 0.020 M) +2 Cr(s) --> 3 Fe(s) +2 Cr°*(aq, 1.5 M) Tey Cpe ay (6) 0.30V (6) 0.35 V (a o4ov ® eft 6 Logst ty [2oS%2 | 28s) =. 440~(> Pld) = 13eV (a - le @ 9. Identify the structural isomers below. Only the carbon backbone is shown - you will have to add the http://lamar.colostate.edu/~leslied/ html/C113fa03/practiceexamEOS.html 12/9/2003 
