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CHEM 302 HW10 - jrr944 Homework 10 Lyon(53565 This...

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jrr944 – Homework 10 – Lyon – (53565) 1 This print-out should have 48 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. This HW assignment is due Thursday, April 10, by 4:00PM. 001 10.0 points The relationship between the solubility s in water and K sp for the ionic solid M 2 A 3 is 1. K sp = 5 s . 2. K sp = 108 s 5 . 3. K sp = s 5 . 4. K sp = 6 s 2 . 002 10.0 points What is K sp for AgI, if its molar solubility is 9 . 1 × 10 9 mol / L? 1. 6 . 9 × 10 9 2. filler751 3. 8 . 281 × 10 17 4. 5 . 2 × 10 19 5. filler400 6. 0.0053 7. 1 . 4 × 10 21 003 10.0 points Consider the K sp values of the following hy- pothetical salts and indicate which of these is least soluble in water. You really don’t need to use a calculator to solve this problem. 1. AB K sp = 1 × 10 10 2. AB 4 K sp = 1 × 10 25 3. AB 3 K sp = 1 × 10 20 4. AB 2 K sp = 1 × 10 15 004 10.0 points What is the value of K sp for tin(II) sulfide, given that its solubility is 5 . 08 × 10 12 g / 100 g water? 005 10.0 points The ionic substance T 3 U 2 ionizes to form T 2+ and U 3 ions. The solubility of T 3 U 2 is 3 . 61 × 10 20 mol / L. What is the value of the solubility-product constant? 006 10.0 points Determine if a precipitate will form when 0 . 96 g Na 2 CO 3 is combined with 0 . 2 g BaBr 2 in a 10 L solution (BaCO 3 K sp = 2 . 8 × 10 9 ). 1. NaBr precipitates 2. NaBr does not precipitate 007 10.0 points Many people like to eat at restaurants and drink sweetened iced tea. Diligent wait staff work to keep one’s tea glass full of iced tea, so many people find themselves re-sweetening their tea throughout the meal. Is it possible to create a sweetened tea with a concentration of dissolved sugar that would remain constant throughout the meal, by adding sugar to the tea only once during the meal? (Assume some stirring, of course.) 1. Yes 2. No 008 10.0 points The compound MX 3 has a molar solubility of 0.00153 M. What is the value of K sp for MX 3 ? 1. 1 . 48 × 10 10 2. 5 . 48 × 10 12 3. 4 . 93 × 10 11 4. 1 . 43 × 10 8
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jrr944 – Homework 10 – Lyon – (53565) 2 5. 9 . 67 × 10 8 009 (part 1 of 3) 10.0 points Copper(I) sulfide has a K sp of 1 . 6 × 10 48 . What is the molar solubility of copper(I) sul- fide? 1. 6 . 3 × 10 25 2. 7 . 3 × 10 18 3. 5 . 3 × 10 49 4. 8 . 9 × 10 25 5. 9 . 2 × 10 17 6. 7 . 4 × 10 17 7. 2 . 5 × 10 16 010 (part 2 of 3) 10.0 points Strontium phosphate has a K sp of 1 . 0 × 10 31 . What is the concentration of the phosphate ion? 1. 1 . 3 × 10 16 2. 4 . 9 × 10 7 3. 4 . 3 × 10 8 4. 9 . 7 × 10 12 5. 6 . 4 × 10 7 6. 7 . 3 × 10 18 7. 2 . 6 × 10 11 011 (part 3 of 3) 10.0 points What is the molar solubility of silver cyanide in 0.075 M NaCN? K sp of NaCN is 1 . 2 × 10 16 .
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