# 9 - Elbel Brittany – Homework 9 – Due Apr 3 2006 noon...

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Unformatted text preview: Elbel, Brittany – Homework 9 – Due: Apr 3 2006, noon – Inst: J A Holcombe 1 This print-out should have 12 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. The due time is Central time. 001 (part 1 of 1) 10 points For Ag 2 SO 4 , K sp = 1 . 7 × 10- 5 , and the equi- librium is Ag 2 SO 4 * ) 2Ag + + SO 2- 4 . What is the concentration of Ag + in a sat- urated solution of Ag 2 SO 4 in which [SO 2- 4 ] is made equal to 0.040 M by the addition of Na 2 SO 4 ? 1. 2 . 1 × 10- 4 M 2. 4 . 2 × 10- 4 M 3. 1 . 8 × 10- 2 M 4. 2 . 1 × 10- 2 M correct 5. 1 . × 10- 2 M Explanation: 002 (part 1 of 1) 10 points The solubility product constant of BaF 2 is K sp = 2 × 10- 6 . How many moles of BaF 2 dissolve in one liter of water? 1. 8 × 10- 3 mol correct 2. 2 × 10- 6 mol 3. 1 × 10- 3 mol 4. 1 × 10- 6 mol Explanation: 003 (part 1 of 1) 10 points CaSO 4 has a K sp = 3 × 10- 5 . In which of the following would CaSO 4 be most soluble? 1. same solubility in all three cases 2. 0.5 M K 2 SO 4 (aq) 3. 1.0 M CaCl 2 (aq) 4. pure water correct Explanation: 004 (part 1 of 1) 10 points What is the molar solubility of AuCl 3 ? K sp = 3 . 2 × 10- 25 ....
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9 - Elbel Brittany – Homework 9 – Due Apr 3 2006 noon...

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