LQs for web 2-28 to 3-2-06

LQs for web 2-28 to 3-2-06 - Tuesday February 28 th 2006...

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Unformatted text preview: Tuesday, February 28 th , 2006 In-Lecture To Do List 1. Weak Base a. Q1 . NH 3 problem 2. Weak Bases & K b conversions a. Q2. K b problem: K b (K w = K a x K b ) b. Q3. SO 3 2- pH problem c. Q4. NH 4 Cl pH problem from K b 3. Oxyacids: review + discussion 4. Lewis acids & bases (short movie) 5. LQ: Q5 – acid concept question 6. CHAPTER 17: introduction a. common ion effect (short movie) + Q6. problem (if we have time) b. buffers c. titration Q1. What is the pH of a 0.10 M NH 3 solution? (K b = 1.80 x 10-5 ) 2 . 8 7 1 1 . 1 2 1 . 8 1 . 8 x 1- 2 N o n e o f t h e a b o v e 28% 32% 0% 17% 23% 1. 2.87 2. 11.12 3. 1.80 4. 1.80 x 10-2 5. None of the above Q2. What is the K b for the reaction of sulfite (SO 3 2- ) with water? (K a1 = 1.70 x 10-2 ; K a2 = 6.40 x 10-8 ) 6 . 4 x 1- 8 . 9 x 1- 7 1 . 5 6 x 1- 7 1 . 7 x 1- 2 N o n e o f t h e a b o v e 12% 16% 5% 12% 55% 1. 6.40 x 10-8 2. 0.90 x 10-7 3. 1.56 x 10-7 4. 1.70 x 10-2 5. None of the above Q3. What is the pH for a 0.1 M sulfite (SO 3 2-...
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This note was uploaded on 07/17/2008 for the course CHEM 122 taught by Professor Zellmer during the Winter '07 term at Ohio State.

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LQs for web 2-28 to 3-2-06 - Tuesday February 28 th 2006...

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