Chapter%2013_Acids%20and%20Bases_post

Chapter%2013_Acids%20and%20Bases_post - CHM 11200 Spring 10...

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CHM 11200 Spring 10 Chapter 13 Acids and Bases
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What are Acids and Bases? Arrhenius model of acids and bases: acids produce H + ions in solution bases produce OH ions in solution
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Arrhenius Model and Neutralization The Arrhenius model explains how acids and bases neutralize each other: HCl (aq) + NaOH (aq) NaCl (aq) + H 2 O ( l ) H + (aq) + Cl (aq) + Na + (aq) + OH (aq) Na + (aq) + Cl (aq) + H 2 O ( l )
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More on Arrhenius Model The Arrhenius model has some drawbacks H + (a bare proton) is very small and a very concentrated positive charge – unlikely to exist on it’s own in solution model assumes that base contains OH – but some do not (NH 3 , for example) We need a broader definition of acids and bases to deal with these problems . . .
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Brønsted-Lowry Theory Brønsted-Lowry theory defines acids and bases differently. acid – any substance that can donate an H + ion to another substance base – any substance that can accept an H + ion from another substance This covers all Arrhenius acids and bases plus others (like bases with no OH and salts which act as acids or bases)
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This note was uploaded on 02/27/2012 for the course CHEM 112 taught by Professor Harwood during the Spring '11 term at Purdue University-West Lafayette.

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Chapter%2013_Acids%20and%20Bases_post - CHM 11200 Spring 10...

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