chapter 16-6 slides per page

chapter 16-6 slides per page - Topics Acid and Base...

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1 Topics • Acid and Base Concepts • Arrhenius Acids and Bases • Bronsted-Lowry Acids and Bases • Lewis Acids and Bases • Relative Strengths of Acids and Bases • Acid/Base Strength and Molecular Structure • The Self-ionization of Water • The pH Scale Seven slides following this one contain the review of concepts covered in chapter 4. Please make sure you go over them before the lecture. Classical Acid and Base Definition (Arrhenius Theory) ACID: any substance that, when dissolved in water, increases the concentration of H 3 O + ( H + ) BASE: any substance that, when dissolved in water, increases the concentration of OH - ions. Strong Acids and Bases • In the Arrhenius concept, a strong acid is a substance that ionizes completely in aqueous solution to give H 3 O + (aq) and an anion. • In the Arrhenius concept, a strong base is a substance that ionizes completely in aqueous solution to give OH - (aq) and a cation.
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2 Weak Acids and Bases • Weak acids and bases are not completely ionized and exist in reversible reaction with the corresponding ions. Example of weak acid: CH 3 COOH(aq) + H 2 O(l) ֖ CH 3 COO - (aq) + H 3 O + (aq) Example of weak base: NH 3 (aq) + H 2 O(l) ֖ NH 4 + (aq) + OH - (aq) Limitations of Arrhenius Theory - valid only for aqueous solutions - it singles out the OH - ion as the source of base character, when other species can play a similar role
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This note was uploaded on 05/04/2010 for the course CHEMISTRY 130 taught by Professor Jadwigasipowska during the Winter '10 term at University of Michigan.

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chapter 16-6 slides per page - Topics Acid and Base...

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