test2 - Version 001 Exam 2 vanden bout (51640) 1 This...

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Unformatted text preview: Version 001 Exam 2 vanden bout (51640) 1 This print-out should have 32 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. Msci 20 0317 001 10.0 points How many mL of a 0.001 M chloride solution must be added to a 100 mL solution of 7 . 2 10 5 M Ag + solution for AgCl to precipitate? K sp (AgCl) = 1 . 8 10 10 (Neglect dilution by the added Cl solution.) 1. Need to know the solution pH to solve this problem 2. 0.03 mL 3. 2.6 mL 4. 0.25 mL 5. 40.6 mL Msci 20 0604 002 10.0 points AgCl would be least soluble in 1. 0.1 M CaCl 2 . 2. 0.1 M HNO 3 . 3. 0.1 M NH 3 . 4. 0.1 M HCl. 5. pure water. Holt da 18 review 35 003 10.0 points Calculate whether a precipitate will form (and why) if 0 . 35 L of 0 . 0044 M Ca(NO 3 ) 2 and . 17 L of 0 . 00039 M NaOH are mixed at 25 C. K sp for Cu(OH) 2 is equal to 5 . 5 10 6 . 1. Cu(OH) 2 precipitates because Q > K . 2. Cu(OH) 2 does not precipitate because Q < K . 3. Cu(OH) 2 precipitates because Q < K . 4. Cu(OH) 2 does not precipitate because Q > K . LDE Selective Precipitation 003 004 10.0 points Consider the following K sp values for lead salts: PbCO 3 = 7 . 4 10 14 PbSO 4 = 1 . 6 10 8 PbS = 3 . 10 28 PbCrO 4 = 2 . 8 10 13 Which pair would be most difficult to sepa- rate by fractional precipitation? 1. SO 2 4 and CO 2 3 2. S 2 and CrO 2 4 3. CrO 2 4 and CO 2 3 4. SO 2 4 and CrO 2 4 Msci 18 0411 005 10.0 points Assume that five weak acids, identified only by numbers (1, 2, 3, 4, and 5), have the following ionization constants. Ionization Acid Constant K a value 1 1 . 10 3 2 3 . 10 5 3 2 . 6 10 7 4 4 . 10 9 5 7 . 3 10 11 The anion of which acid is the strongest base? 1. 3 2. 1 3. 4 4. 2 Version 001 Exam 2 vanden bout (51640) 2 5. 5 Msci 19 5010 006 10.0 points What is the concentration of hydroxide ion in a 0.10 M solution of NaCN? The ionization constant of the weak acid HCN is 4.0 10 10 ....
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This note was uploaded on 01/29/2012 for the course CH 302 taught by Professor Holcombe during the Spring '07 term at University of Texas at Austin.

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test2 - Version 001 Exam 2 vanden bout (51640) 1 This...

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