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Lab Final - CHEMISTRY 116 Laboratory Final Exam Dr T.R...

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CHEMISTRY 116 Laboratory Final Exam Dr. T.R Chigwada August 6, 2007 An optical scoring machine will grade this examination. The machine is not programmed to accept the correct one of two or more sensed answers and will not sense answers that are lightly marked. Mark your sheet carefully with a No. 2 soft lead pencil and erase any undesired marks COMPLETELY . Avoid making any extraneous marks on the answer sheet other than the information mentioned below. On the answer sheet: 1. Print your name in the space for NAME (last name first, CIRCLE your last name). 2. In the space marked SUBJECT write Chem 116. 3. In the space marked TEST NO. write Lab Final. 4. In the space DATE write Summer 07 5. In the space marked PERIOD write Chigwada. 6. Check to see that you have 21 examination questions, a periodic table, and a scantron. Hand in only the answer sheet!! Useful Equations and Constants: R = 0.08206 L atm/mol K = 8.314 J/mol K 1 atm = 760 torr = 760 mm Hg K w = 1.0 x 10 -14 Relax and Good Luck !!!!! a ac - b -b x 2 4 2 ± =
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1. A 2.5 M aqueous solution of Fe 2 (SO 4 ) 3 is _____ M in Fe 3+ and _____ M in SO 4 2- . A) 2.5; 2.5 B) 5.0; 7.5 C) 7.5; 5.0 D) 2.5; 5.0 E) 7.5; 2.5 2. Predict products and write the balanced net ionic equation for the reaction below. Pb(NO 3 ) 2 (aq) + NH 4 Cl(aq) The reacting ions are: A) Pb 2+ and NH 4 + B) NH 4 + and Cl - C) NH 4 + and NO 3 - D) Pb 2+ and NO 3 - E) Pb 2+ and Cl -
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