Sample_Exam_2_2008

Sample_Exam_2_2008 - CHEMISTRY 1120 Dr. Megehee Sample Exam...

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CHEMISTRY 1120 Sample Exam Two Spring 2008 Dr. Megehee NAME: ________________________________ SJU I.D.: (PLEASE PRINT) (eight digit number of front of SJU ID card) FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN A ZERO!!! 1 Before starting, print your name and eight digit SJU I.D. number above. On SIDE ONE of the answer sheet enter your ID number in the first eight boxes of the scantron sheet. Pencil in the corresponding boxes. Print your name where it says "NAME". 2. You should have nothing at your seat except two #2 pencil and a St. John's University student id. Everything else should be at the front of the room. 3. Turn off all electronic devices NOW!! This includes cell phones, paging devices, blackberries, laptop computers, palm pilots, and calculators. Place these items below your desk. 4. This exam consists of 46 multiple choice questions. Indicate the most appropriate answer to each question on the attached scoring sheet using a #2 pencil. The question and answer sheets must be returned at the end of the exam period. 5. The answer keys will be posted on St. John’s Central in a separate file. PROPER CONDUCT DURING AN EXAM 1. Communication between students, by any means, is prohibited. 2. Possession of any unauthorized materials (crib notes, cell phones, paging devices, blackberry, laptop, or palm pilot) is prohibited. 3. Violation of either of the above rules can result in a minimum penalty of a grade of zero on this exam. A PERIODIC TABLE IS ATTACHED FOR YOUR CONVENIENCE
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1. The conjugate acid of HPO 4 2 - is A) H 2 PO 4 B) H 3 PO 4 C) PO 4 3 - D) PO 4 2 - E) H 2 PO 4 - 2. Which one of the following species is amphiprotic? A) PO 4 3 - ( aq ) B) HCl( g ) C) HSO 4 - ( aq ) D) Cl - ( aq ) E) CO 3 2 - ( aq ) 3. Which one of the species listed below does not have a conjugate base? A) H 2 O B) H 3 O + C) NH 2 - D) OH - E) F - 4. In the reaction, HClO 3 + N 2 H 4 b ClO 3 - + N 2 H 5 + , which one of the sets below constitutes a conjugate (acid-base) pair? A) HClO 3 , N 2 H 4 B) N 2 H 4 , ClO 3 - C) HClO 3 , N 2 H 5 + D) N 2 H 4 , N 2 H 5 + E) ClO 3 - , N 2 H 5 + 5. Which one of the five species shown below is the strongest oxyacid? A) X O O O O H D) X O O H H H B) X O O O H E) X O H O O H C) X O O H
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6. For the system NH 2 OH + CH 3 NH 3 + b CH 3 NH 2 + NH 3 OH + 95% 95 % 5 % 5 % the state of equilibrium in the system is described by the numbers given. Which of the species is the strongest acid in the system? A) NH 2 OH B) CH 3 NH 3 + C) CH 3 NH 2 D) NH 3 OH + E) NH 2 OH and CH 3 NH 3 + are equal in acid strength, and are the strongest acids in the system 7. Which one of the following five species is the most acidic substance? A) HClO B) HClO 2 C) HClO 3 D) HClO 4 E) Cl - 8. Given the following substances in order of increasing acid strength, HOCl( aq ) < HC 2 H 3 O 2 ( aq ) < HC 2 O 4 - ( aq ) < HOCN( aq ) < HNO 2 ( aq ) < HCl( aq ) Which one of the species in the set listed below is the strongest base of that set? A)
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Sample_Exam_2_2008 - CHEMISTRY 1120 Dr. Megehee Sample Exam...

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