Class Notes Jan 27

Class Notes Jan 27 - 1/27/2010 Announcements: Wednesday,...

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1/27/2010 1 Announcements: Wednesday, January 27, 2010 Homework WebAssign #4- Due Wednesday, February 3 at 8:00 AM Recitation Week 3- “Complex Ions” Lab 1- Equilibrium Studies Complete prelab prior to recitation. Suggested Textbook Questions Begin Chapter 19 problems. Which of the following are Lewis bases? Cl - , Cu 2+ , OH - January 27, 2010 – CT#1 A. Cl - B. Cu 2+ C. OH - E. Cl - , Cu 2+ & OH - D. Cl - & OH - Cl - and OH - both have lone pairs to donate. Cu 2+ is a Lewis acid, electron pair acceptor. Complex Ion Formation in Lab this Week: Complex Ion p. 616 Each water forms a covalent bond to the metal ion with a lone pair of electrons from an oxygen. When a stronger base is added (ex. NCS - ), a water can be displaced. [Fe(H 2 O) 6 ] 3+ ( aq ) + NCS - ( aq ) → [Fe(H 2 O) 5 (NCS)] 2+ ( aq ) + H 2 O( l ) Types of Solutions So Far Strong Acid Strong Base Weak Acid Weak Base - Dissociates 100% to make H 3 O + and an anion. - Dissociates 100% to make OH - and a cation. - Dissociates according to K a to make H 3 O + and the weak conjugate base.
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Class Notes Jan 27 - 1/27/2010 Announcements: Wednesday,...

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