Chem_208_Lecture_13_Color

Chem_208_Lecture_13_Color - Today/Thursday Ch...

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Today/Thursday: Ch. 16.1-16.5 (Acid/Base) Thursday: Ch 17.2 (Buffer Solutions) PS5 Due Friday
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Ch. 16- Acids and Bases Strong Acid: e.g. HCl (completely ionized) Bronsted-Lowry Theory: An acid is a proton donor; a base is a proton acceptor. Base Acid
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Strong Acid: e.g. HCl (completely ionized) Bronsted-Lowry Theory: An acid is a proton donor; a base is a proton acceptor. Base Acid What is the [H 3 O + ] for 0.25M HCl (aq)? [H 3 O + ] = 0.25M
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Weak Acid- CH 3 COOH (Acetic Acid)
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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 : What is the [H 3 O + ] for 0.100 M Acetic Acid? [H 3 O + ] =1.34 x 10 -3 M Calculation is the same as in previous eqilibrium problems.
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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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Some Weak Acids
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Weak Base- Ammonia [] 5 10 x 8 . 1 3 NH OH 4
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Chem_208_Lecture_13_Color - Today/Thursday Ch...

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