chem quiz 4 - Version 366 Quiz 4 VANDEN BOUT (53585) 1 This...

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Unformatted text preview: Version 366 Quiz 4 VANDEN BOUT (53585) 1 This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points What is the concentration of SO 2- 4 in 2.0 M H 2 SO 4 ? K a1 is strong and K a2 = 1 . 2 10- 2 . 1. 4 . 10- 2 M 2. 1 . 10- 7 M 3. 2 . 10- 1 M 4. 1 . 2 10- 2 M correct 5. 4 . 10- 1 M Explanation: 002 10.0 points AgCl would be least soluble in 1. 0.1 M HCl. 2. 0.1 M HNO 3 . 3. 0.1 M CaCl 2 . correct 4. 0.1 M NH 3 . 5. pure water. Explanation: 003 10.0 points Consider the following K sp values for metal carbonates: CdCO 3 = 2 . 5 10- 14 CoCO 3 = 8 . 10- 13 CuCO 3 = 2 . 5 10- 10 PbCO 3 = 1 . 5 10- 13 Which pair would best be separated by frac- tional precipitation? 1. Cu 2+ and Pb 2+ 2. Cd 2+ and Co 2+ 3. Cd 2+ and Pb 2+ 4. Co 2+ and Cu 2+ 5. Co 2+ and Pb 2+ 6. Cd 2+ and Cu 2+ correct Explanation: All the salts are 1:1 ratios so the K sp s can be directly compared for solubility. The pairbe directly compared for solubility....
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This note was uploaded on 03/22/2008 for the course CH 302 taught by Professor Holcombe during the Spring '07 term at University of Texas at Austin.

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chem quiz 4 - Version 366 Quiz 4 VANDEN BOUT (53585) 1 This...

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