# HW5 - padilla(tp5647 – Homework 5 – Sutcliffe –(53770...

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Unformatted text preview: padilla (tp5647) – Homework 5 – Sutcliffe – (53770) 1 This print-out should have 25 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points Consider the following sets A, B, and C A 1 ) bracketleftbigg N C N b b b b b b b b bracketrightbigg 2 − A 2 ) bracketleftbigg N C N b b b b b b b b bracketrightbigg 2 − B 1 ) O As O b b b b b b O b b b b b b O b b b b b b b b b b b b 3 − C 1 ) I O O O O b b b b b b b b b b b b b b b b b b − B 2 ) O As O b b b b b b O b b b b O b b b b b b b b b b b b 3 − C 2 ) I O O O O b b b b b b b b b b b b b b b b b b b b − B 3 ) O As O b b b b O b b b b O b b b b b b b b 3 − C 3 ) I O O O O b b b b b b b b b b b b b b b b b b b b b b b b − of ions. Determine the formal charge on each atom and identify the structure of lowest energy for each set A, B, and C. 1. A 1 , B 1 , C 1 2. A 2 , B 2 , C 2 3. A 1 , B 2 , C 1 correct 4. A 1 , B 2 , C 3 5. A 2 , B 3 , C 3 6. A 2 , B 3 , C 2 Explanation: A 1 ) bracketleftbigg N C N b b b b b b b b- 1- 1 bracketrightbigg 2 − A 2 ) bracketleftbigg N C N b b b b b b b b- 2 bracketrightbigg 2 − B 1 ) O As O b b b b b b O b b b b b b O b b b b b b b b b b b b- 1- 1- 1- 1 +1 3 − C 1 ) I O O O O b b b b b b b b b b b b b b b b b b- 1 − B 2 ) O As O b b b b b b O b b b b O b b b b b b b b b b b b- 1- 1- 1 3 − C 2 ) I O O O O b b b b b b b b b b b b b b b b b b b b- 1- 1 +1 − B 3 ) O As O b b b b O b b b b O b b b b b b b b- 3 3 − C 3 ) I O O O O b b b b b b b b b b b b b b b b b b b b b b b b- 1- 1- 1- 1 +3 − 002 10.0 points What is the formal charge on the Xe atom in XeF 4 ? 1. +4 2.- 4 3. correct 4. +2 Explanation: The formal charge on Xe is 8- parenleftBigg 4 e − nonbonding + 8 e − shared 2 parenrightBigg = 0 Xe F b b b b b b F b b b b b b F b b b b b b F b b b b b b b b b b 003 10.0 points Draw the Lewis structures for IF 7 and SiF 2 − 6 . How many electrons surround the cen- tral atom on IF 7 and on SiF 2 − 6 , respectively? 1. 10 and 14 padilla (tp5647) – Homework 5 – Sutcliffe – (53770) 2 2. None of these 3. 12 and 10 4. 14 and 10 5. 14 and 12 correct 6. 10 and 12 7. 12 and 14 Explanation: The Lewis Structures are I F b b b b b b F b b b b b b F b b b b b b F b b b b b b F b b b b b b F b b b b b b F b b b b b b and Si F b b b b b b F b b b b b b F b b b b b b F b b b b b b F b b...
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HW5 - padilla(tp5647 – Homework 5 – Sutcliffe –(53770...

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