Chem_208_14_07_web - Today: Ch. 16.4-16.5 (Acid/Base), Ch...

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1 Today: Ch. 16.4-16.5 (Acid/Base), Ch 17.2 (Buffer Solutions) Tuesday: Continuing 16.6-16.7 PS5 Due tomorrow, PS6 due Fri. March 13
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2 Weak Acid- CH 3 COOH (Acetic Acid) K a K a [] [] 5 10 x 8 . 1 2 O 3 H 2 HC O 3 H 2 O 3 H 2 C a K = + = Acid Ionization Constant, K a : Acid Conjugate acid/base pair Acid Base Base Conjugate acid/base pair Conjugate acid/base pairs differ by a proton (H + )
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3 Weak Base- Ammonia [] [] 5 10 x 8 . 1 3 NH OH 4 NH b K = + = Base Ionization Constant, K b : K b K b Weak Base Rel. Strong Acid Weak Acid Strong Base What is the [OH - ] for a 0.250 M Ammonia Solution? [OH - ] =2.12 x 10 -3 M
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4 0.10M HNO 3 (Strong acid): HNO 3(aq) +H 2 O(l) H 3 O + (aq)+NO 3 - (aq) [H 3 O + ] = ? 0.10 M Ca(OH) 2 (Strong base): Ca(OH) 2 (s) Ca 2+ (aq) + 2OH - (aq) [OH - ] = ? [H 3 O + ] = 0.10M [H 3 O + ] = 0.20M
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Strong acids have relatively weak conjugate bases. Strong Acid
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This note was uploaded on 05/18/2008 for the course CHEM 2080 taught by Professor Davis,f during the Spring '07 term at Cornell University (Engineering School).

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Chem_208_14_07_web - Today: Ch. 16.4-16.5 (Acid/Base), Ch...

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