This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: Yoon, Seong Meen – Homework 8 – Due: Nov 5 2007, 11:00 pm – Inst: James Holcombe 1 This printout should have 24 questions. Multiplechoice 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 The solubility product constant of PbCl 2 is 1 . 7 × 10 5 . What is the maximum concentra tion of Pb 2+ that can be in ocean water that contains 0.0500 M NaCl? 1. 1 . 7 × 10 3 M 2. 4 . 2 × 10 8 M 3. 8 . 5 × 10 7 M 4. 6 . 8 × 10 3 M 5. 3 . 4 × 10 3 M 002 (part 1 of 1) 10 points Calculate the solubility of iron(III) hydrox ide at pH = 8 . 4. The solubility product of iron(III) hydroxide is 2 × 10 39 . 003 (part 1 of 1) 10 points The mineral strontianite (SrCO 3 ) is quite in soluble in water. The best reagent which could be added to dissolve a sample of stron tianite is 1. NaOH solution. 2. NH 3 solution. 3. H 2 CO 3 solution. 4. HCl solution. 5. SrCl 2 solution. 004 (part 1 of 1) 10 points Consider the following K sp values for metal sulfides: CdS = 3 . 6 × 10 29 CoS = 5 . 9 × 10 21 CuS = 8 . 7 × 10 36 PbS = 8 . 4 × 10 28 Which pair would be most difficult to sepa rate by fractional precipitation? 1. Cu +2 and Pb 2+ 2. Cd +2 and Co +2 3. Co +2 and Pb 2+ 4. Cd +2 and Pb 2+ 005 (part 1 of 1) 10 points If you have 250 mL of a solution that is 0.20 M [Ba 2+ ], how many grams of NaF(s) should you add to reduce the equilibrium concentration [Ba 2+ ]to0.0001M?BaF 2 (s)isslightlysoluble in water at 25 ◦ C, K sp = 4 . 7 × 10 6 . Answer in units of g....
View
Full
Document
This note was uploaded on 05/14/2009 for the course CH 53575 taught by Professor Hackert during the Spring '09 term at University of Texas at Austin.
 Spring '09
 Hackert
 pH

Click to edit the document details