115 Exam2 Sp 2005 - Name _ Section _ Social Security # _...

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Name _____________________________ Chemistry 115 Section ____________ EXAM II Total Points = 120 Social Security # ___________________ Thursday, 6:30 PM Instructor ________________________ March 3, 2005 Directions : 1. Each student is responsible for following directions. Read this page carefully. 2. Write your name and other requested information on this page and on the separate answer sheet. 3. CODE your name on the answer sheet using an ordinary (#2) pencil. 4. CODE your correct nine-digit identification number ( Social Security ) on the answer sheet. THIS IS VERY IMPORTANT! 5. CODE your section number on the answer sheet. Please use all four digits, 0101, 0102, 0201, or 0202. This is also very important! 6. Put all calculations on the examination pages. DO NOT PUT ANY EXTRA MARKS ON THE COMPUTER ANSWER SHEET! 7. This exam consists of 21 multiple-choice questions worth 6 points each (except #1, #6, and #10 = 4 points each). Choose the one best or correct answer for each question and write it both on your exam paper and on the computer answer sheet. The computer answer sheet is the only one that will be graded! 8. This exam consists of 7 pages plus a Periodic Table. Please check to be sure that you have them all!
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2 Chem 115 ! Exam 2 ! 3/3/05 D____ 1. (4 points) Which of the compounds below is least soluble in water? (a) HBr (d) PbS (b) Ca(NO 3 ) 2 (e) NaOH (c) LiCl C____ 2. In aqueous solution, silver nitrate reacts with sodium chromate to form solid silver chromate and aqueous sodium nitrate. The net ionic equation for this reaction is: (a) 2 AgNO 3(aq) + Na 2 CrO 4(aq) ÿ Ag 2 CrO 4(s) + 2 NaNO 3(aq) (b) 2 Ag + (aq) + 2 NO 3 (aq) + 2Na + (aq) + CrO 4 2– (aq) ÿ Ag 2 CrO 4(s) + 2Na + (aq) + CrO 4 2– (aq) + 2 NO 3 (aq) (c) 2 Ag + (aq) + CrO 4 2– (aq) ÿ Ag 2 CrO 4(s) (d) 2 AgNO 3(aq) + Na 2 CrO 4(aq) ÿ Ag 2 CrO 4(s) (e) none of the above A____ 3. The driving force for dissolution of an ionic salt, such as NaCl (s) , in water is best described as follows: (a) An energy of solvation of separated cations and anions that exceeds the electrostatic
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This test prep was uploaded on 04/02/2008 for the course CHEM 115 taught by Professor L during the Spring '02 term at Purdue University-West Lafayette.

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115 Exam2 Sp 2005 - Name _ Section _ Social Security # _...

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