ex3 A - Chemistry 13 Exam III Form A Summer 2006 Name...

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Chemistry 13 Name _______________________ Exam III Form A Section _______________________ Summer 2006 Student No. _______________________ IMPORTANT : On the scantron (answer sheet), you MUST clearly fill your name , your student number , section number , and test form (white cover = test form A; yellow cover = test form B). Use a #2 pencil. There are 25 questions on this exam. Check that you have done all of the problems and filled in the first 25 bubbles on the scantron. The maximum score on this exam is 25 points. Your score will be reported in percent (max 100%). Exam policy Calculators with text-programmable memory are not allowed. Relevant data and formulas, including the periodic table, are attached at the end of this exam. Your grade will be based only on what is on the scantron form. The answer key will be posted on the web after the exam (on the Exam Schedule page). Hints As you read the question, underline or circle key words to highlight them for yourself. Avoid errors from "mis-reading" the question. Pay attention to units and magnitudes (decimal places) of numbers obtained from calculations. There is no penalty for guessing.
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CHEMISTRY 13 EXAM 3 Summer 06 FORM A --------------------------------------------------------------------------------------------------------------------------------------- BASIC SKILLS --------------------------------------------------------------------------------------------------------------------------------------- 1. When the following oxidation/reduction reaction is balanced in acid solution, what is the coefficient of H 2 O (l)? N O 2 (aq) + Cr 2 O 7 2– (aq) Cr 3+ (aq) + NO 3 (aq) A. 7 B. 5 C. 0 D. 3 E. 4 --------------------------------------------------------------------------------------------------------------------------------------- 2. Which compound below has chlorine in the highest oxidation state? A. HCl B Cl 2 C . H C l O 3 D I C l 3 E C l F 3 --------------------------------------------------------------------------------------------------------------------------------------- 3. Which substance is serving as the reducing agent in the following reaction? Fe 2 S 3 (s) + 12HNO 3 (aq) 2Fe(NO 3 ) 3 (aq) + 3S(s) + 6NO 2 (g) + 6H 2 O(l) A. HNO 3 B. Fe 2 S 3 C. NO 2 D. S E. H 2 O ---------------------------------------------------------------------------------------------------------------------------------------
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4. Complete and balance the following half reaction in acid. CrO 2 (aq) CrO 4 2 (aq) How many electrons are needed and is the reaction an oxidation or reduction? A.
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This note was uploaded on 07/23/2008 for the course CHEM 112 taught by Professor Vandersluys,lorschmid,kylem during the Fall '07 term at Pennsylvania State University, University Park.

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ex3 A - Chemistry 13 Exam III Form A Summer 2006 Name...

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