Acids_and_Bases_S11

Acids_and_Bases_S11 - Acids and Bases GLY 4241 - Lecture...

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1 Acids and Bases GLY 4241 - Lecture Spring, 2011
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2 Acids Acids are substances that dissociate to donate protons (Brønsted definition) General Formula: H 2n+1 O n +
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3 Lone Pair Acceptor Lewis definition of an acid is any substance that accepts a lone pair of electrons Important when studying catalysis
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4 Bases Brønsted modified this definition to be that of a proton acceptor Bases yield hydroxide ion to solution (classical)
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5 Dissociation of Water
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6 Dissociation Constant of Water pH is the negative log of the hydrogen ion concentration For water:
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7 Strong Acid Strong acids dissociate completely in water Thus a 0.1M solution of nitric acid will have [H+] = 0.1 = 10 -1
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8 Strong Base A strong base will dissociate completely to yield OH - ions Thus a 0.01M solution of NaOH will have [OH-] = 0.01 =10 -2
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9 p(OH)
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10 Weak Acids and Bases Weak acids and bases do not dissociate completely in water Ionization constants are necessary • K HF = 10 -3.2
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11 Multifunctional Acid Groups First ionization constant
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12 Multifunctional Acid Groups 2 Second ionization constant
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This document was uploaded on 03/29/2011.

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Acids_and_Bases_S11 - Acids and Bases GLY 4241 - Lecture...

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