acids_and_bases_L1_Spring2008

acids_and_bases_L1_Spring2008 - Room Assignments for Exam 2...

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1 Engineering 145 106323691 106474392 Javits 109 106474393 999999999 Harriman Hall 137 106241820 106287741 Engineering 143 106287742 106323690 Javits 102 106176862 106209479 Javits 110 106209480 106241819 Old Chemistry 116 106143846 106176861 Earth & Space Science 001 106067704 106143845 Javits 100 Balcony 105893403 106067703 Javits 100 Main Floor 000000000 – 105893402 Room Solar ID Room Assignments for Exam 2 Thursday, March 27, 8:30 – 10:00 PM On material covered from Monday, Feb. 18 through Friday, Mar. 14 On material covered from Monday, Feb. 18 through Friday, Mar. 14 . 2 Solution Solution Equilibria Equilibria : : Ch 17 Recap on Acids & Bases Recap on Acids & Bases Buffers Buffers Titrations Titrations Solubility Solubility Prof. Roy A. Lacey [email protected] [email protected]
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3 Send Feedback Send Feedback Prof. Roy A. Lacey [email protected] [email protected] 4 Quick Recap on Acids &Bases Quick Recap on Acids &Bases Considerations Considerations • What are the molecular and ionic species in solution ? ¾ Which ones can be neglected? • Are there some equilibria that can be neglected ? ¾ eg. self ionization of water • What simplifying algebraic assumption can be made ¾ Can you justify this assumption? • Strong Acids • Strong Bases • Weak Acids & Bases 9 Equilibrium problem
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5 Quick Recap on Acids &Bases Quick Recap on Acids &Bases 5 32 3 3 14 22 3 1.8 10 1.0 10 a w CH COOH H O H O CH COO K HO HO HO OH K + −− +− ++ = × = × ZZX YZZ What is the pH of a 1.00 M aqueous solution of CH 3 COOH? 5 3 3 1.8 10 1.00 - - Change -x +x a CH COOH H O H O CH COO K Init = × () [] 2 33 5 3 +x Equil Conc 1 1.8 10 1.00 a xx x H O CH COO x K CH COOH x ⎡⎤ ⎣⎦ == = × x<<1.0 25 3 3 3 3 1.8 10 4.2 10 M pH = -log log 4.2 10 2.38 x xH O × =− × = 6 Recap: Acid Recap: Acid -Base Properties of Salt Solutions Base Properties of Salt Solutions Ammonium perchlorate is the salt of a weak base weak base , ammonia ammonia , and a strong acid, perchloric acid . Which statement about a solution of ammonium perchlorate is correct? a) It is strongly acidic. b) It is weakly acidic. c) It is neutral. d) It is weakly basic. e) We cannot predict its acid-base properties without more information. b [ ] [ ] [ ] [ ] 44 4 4 NH ClO NH ClO + =+ [ ] 42 3 3 NH H O H O NH + + ⎯⎯→ ←⎯⎯ [ ] 4 ClO H O HClO OH += + • Salts of strong acids and strong bases form neutral solutions • Salts of weak acids and strong bases form basic solutions • Salts of strong acids and weak bases form acidic solution
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This note was uploaded on 04/28/2008 for the course CHEM 132 taught by Professor Laceyandhanson during the Spring '08 term at SUNY Stony Brook.

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acids_and_bases_L1_Spring2008 - Room Assignments for Exam 2...

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