4th lecture

4th lecture - 1/25/2008 Announcements: Friday, January 25,...

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1/25/2008 1 Announcements: Friday, January 25, 2008 Homework WebAssign #3- Due Wednesday, January 30 at 8:00 AM CLASS Survey Must be completed online by Friday 1/25 at 5:00 PM Recitation Print Week 2- “Equilibrium-Weak and Strong Acids” ** Monday recitation sections- Please attend another session this week! ** Suggested Textbook Questions Complete Chapter 18 problems. Which of the following is the correct chemical reaction for the K a2 of H 3 PO 4 ? January 23, 2008 - CT#3 A. H 3 PO 4 (aq) + H 2 O( l ) H 2 PO 4 - (aq) + H 3 O + (aq) C. HPO 4 2- (aq) + H 2 O( l ) PO 4 3- (aq) + H 3 O + (aq) D. H 2 PO 4 - (aq) + H 2 O( l ) H 3 PO 4 (aq) + OH - (aq) E. HPO 4 2- (aq) + H 2 O( l ) H 2 PO 4 - (aq) + OH - (aq) B. H 2 PO 4 - (aq) + H 2 O( l ) HPO 4 2- (aq) + H 3 O + (aq) K a2 is the K a rxn for the 2 nd H + being removed. Base Association Constant (K b ) The equilibrium constant for a base reacting with water . NH 3 (aq) + H 2 O ( l ) NH 4 + (aq) + OH - (aq) K b = [NH 4 + ][OH - ] [NH 3 ] ALWAYS HAS THIS FORM! K b >> 1 strong base (Dissociates completely) K b < 1 weak base (Must use K b to calculate [OH - ])
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This note was uploaded on 03/02/2008 for the course CHEM 1131 taught by Professor Redin,kend during the Spring '08 term at Colorado.

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4th lecture - 1/25/2008 Announcements: Friday, January 25,...

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