midterm exam2A Feb09 page1

midterm exam2A Feb09 page1 - Computers and calculators with...

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Chem 102/D1 (2009) MT-II-A M. Klobukowski Midterm Test II A February 27, 2009 ⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯ ⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯ Last Name (please print) First Name Instructions: 1. Print your name on page 1 ; put your signature and Student ID on page 2 . 2. This exam has 4 questions . You should have a total of 7 pages (2 cover sheets, 4 question pages, and 1 overflow sheet). Make sure you have a complete exam. Write your name on any pages detached from the exam. 3. Place your answers on the FRONT SIDE of each page OR on the OVERFLOW SHEET (indicate that you have done so on the question page). Answers on the back of the page will not be marked. 4. Exams written in pencil or red pen and/or exams with whiteout are not eligible for re-grading . 5. This is a closed-book examination. 6. Approved calculators only (only standard scientific calculators may be used).
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Unformatted text preview: Computers and calculators with extensive alphanumeric capabilities, laptops, pocket PCs, PDAs, Palm Pilots, phones, etc., are NOT permitted. 7. Show all work . Answers without explanations or full work will be given mark of zero. 8. The time allowed is 40 minutes . Data and Formula Tables Solubility product constants (at 25 C) K sp AgBr 5.0 10 13 AgCl 1.8 10 10 Zn(OH) 2 1.2 10 17 Ni(OH) 2 2.0 10 15 PbCrO 4 2.8 10 13 Ionization constants (at 25 C) K a Acetic acid 1.8 10 5 Formic acid 1.8 10 4 K b Ammonia 1.8 10 5 K w Water 1.0 10 14 pH = p K a + log A ! " # $ % HA [ ] pH = ! log H 3 O + " # $ % K a = A ! " # $ % H 3 O + " # $ % HA [ ] K b = BH + ! " # $ OH % ! " # $ B [ ] K a ! K b = K w K sp = [ A + ] a [ B ! ] b x = ! b b 2 ! 4 ac 2 a...
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