Chem_215_Lecture_8_BW

Chem_215_Lecture_8_BW - Ch 7 Acids and Bases Bronsted-Lowry...

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1 1 Ch. 7- 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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2 2 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)?
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3 3 Weak Acid- CH 3 COOH (Acetic Acid) CH 3 COOH + H 2 O CH 3 COO - + H 3 O +
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4 4 Weak Acid- CH 3 COOH (Acetic Acid) 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? Calculation is the same as in previous eq’m problems. CH 3 COOH + H 2 O CH 3 COO - + H 3 O +
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5 5 Weak Acid- CH 3 COOH (Acetic Acid) 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 + ) CH 3 COOH + H 2 O CH 3 COO - + H 3 O +
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6 6
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7 7 Weak Base- Ammonia [] 5 10 x 8 . 1 3 NH OH 4
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Chem_215_Lecture_8_BW - Ch 7 Acids and Bases Bronsted-Lowry...

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