178Exam2KeyS07

178Exam2KeyS07 - DR. JESUDOSS KINGSTON DR. JOE BURNETT...

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DR. JESUDOSS KINGSTON DR. JOE BURNETT SPRING 2007 THIS EXAM CONSISTS OF 20 QUESTIONS ON 9 PAGES CHEM 178 HOUR EXAM II March 7, 2007 NAME______________________ RECIT. INSTR.______________ RECIT. SECT._______________ GRADING Teaching Assistants and Recitation Sections PAGE POINTS SCORE Name Sections Time 2 3 4 5 6 7 8 TOTAL 18 pts 15 pts 15 pts 18 pts 15 pts 11 pts 10 pts 102 pts ________ ________ ________ ________ ________ ________ ________ David Ackerman Wei Huang Andrew Lantz Michael Murphy Sean Nedd Beth Prince Rafael Lopes Quirino Suzanne Sander Yongchao Su Aaron West 1, 11 4, 20 14, 15 5, 8 6, 13 3, 12 10, 16 7, 17 2, 9 18, 19 8:00, 9:00 10:00, 9:00 11:00, 12:10 11:00, 12:10 11:00, 10:00 9:00, 10:00 2:10, 12:10 12:10, 1:10 9:00, 1:10 2:10, 3:10 QUESTIONS ARE WRITTEN ON BOTH SIDES OF EACH PAGE. THERE IS A PERIODIC TABLE, EQUATIONS, AND CONSTANTS ON THE LAST PAGE. YOU MAY REMOVE THIS PAGE FOR SCRATCH PAPER. THE ANSWER KEY TO THIS EXAM WILL BE POSTED ON BULLETIN BOARD #6 IN THE HALLWAY EAST OF ROOM 1002 GILMAN AND ON THE CHEM 178 WEBSITE. SHOW ALL WORK. ANSWERS SHOULD INCLUDE APPROPRIATE UNITS AND CONTAIN THE CORRECT NUMBER OF SIGNIFICANT FIGURES. CHEM 178 FINAL EXAM : MONDAY, APRIL 30, 7:00-9:00 P.M. SAME ROOMS AS HOUR EXAMS – NO CHANGE Answer Key
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2 1. (4 pts) What is the conjugate base of HCO 3 ? a) OH b) H 2 CO 3 c) CO 3 2 d) HCO 3 + e) H 3 CO 3 + 2. (4 pts) What is the pH of an aqueous solution at 25.0 o C in which [OH ] is 0.00250 M . a) +2.60 b) –2.60 c) +11.4 d) –11.4 e) –2.25 3. (3 pts) A Brønsted-Lowry acid is defined as a substance that ______ . a) decreases [H 3 O + ] when dissolved in water b) increases [OH ] when dissolved in water c) acts as a proton donor d) acts as a proton acceptor e) acts as a electron pair donor 4. (3 pts) A substance that is capable of acting as both an acid and as a base is __________. a) amphiprotic b) conjugated c) autosomal d) binary acid-base e) miscible f) diprotic 5. (4 pts) The magnitude of K w indicates that __________. a) water autoionizes very slowly b) water autoionizes very quickly c) water autoionizes only to a very small extent d) the autoionization of water is exothermic e) water autoionizes completely
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3 6. (3 pts) Which one of the following is the strongest acid? a) HIO 3 b) HIO 2 c) HIO d) IO 4 e) I 7. (4 pts) Briefly but completely and clearly explain your answer to the previous question.
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This test prep was uploaded on 03/26/2008 for the course CHEM 178 taught by Professor Stoffregen during the Spring '06 term at Iowa State.

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178Exam2KeyS07 - DR. JESUDOSS KINGSTON DR. JOE BURNETT...

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