CH 123 Exam 1 SP10

CH 123 Exam 1 SP10 - Chemistry 123 Exam 1 Spring 2010...

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Chemistry 123 Spring 2010 Oregon State University Exam 1 April 22, 2010 Dr. Richard Nafshun DO NOT OPEN THIS EXAM UNTIL INSTRUCTED. CALCULATORS ARE NOT TO BE SHARED. Test Form 1 Instructions: You should have with you several number two pencils, an eraser, your 3" x 5" note card, a calculator, and your University ID Card. If you have notes with you, place them in a sealed backpack and place the backpack OUT OF SIGHT or place the notes directly on the table at the front of the room. Fill in the front page of the Scantron answer sheet with your test form number (listed above), last name, first name, middle initial, and student identification number. Leave the class section number blank. This exam consists of 25 multiple-choice questions. Each question has four points associated with it. Select the best multiple-choice answer by filling in the corresponding circle on the rear page of the answer sheet. If you have any questions before the exam, please ask. If you have any questions during the exam, please ask the proctor. Open and start this exam when instructed. When finished, place your Scantron form in the appropriate stack. You may keep the exam packet, so please show your work and mark the answers you selected on it. K a [CH 3 COOH (aq)] = 1.80 x 10 -5 (acetic acid) K a [C 6 H 5 COOH (aq)] = 6.30 x 10 -5 (benzoic acid) K a [CH 2 ClCOOH (aq)] = 1.40 x 10 -3 (chloroacetic acid) K b [NH 3 (aq)] = 1.80 x 10 -5 (ammonia) K a [HCOOH (aq)] = 1.80 x 10 -4 (formic acid) K sp [PbCl 2 , lead chloride] = 1.6 x 10 -5 K sp [PbF 2 , lead fluoride] = 3.6 x 10 -8 K sp [MgF 2 , magnesium fluoride] = 3.7 x 10 -8
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1. The pH of 0.655 M HCl (aq) is: (A) 0.345 (B) 0.184 (C) 0.655 (D) 0.736 (E) 4.74 2. The pH of 0.212 M aqueous dimethylamine, C
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CH 123 Exam 1 SP10 - Chemistry 123 Exam 1 Spring 2010...

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