Chapter 4 Proton Transfer--A Simple Reaction

Chapter 4 Proton - Chapter 4 Proton TransferA Simple Reaction 4.1~4.4 Bronsted-Lowry acid-base theory The essence of Bronsted acid-base reactions

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1 Chapter 4 Proton Transfer—A Simple Reaction 4.1~4.4 Bronsted-Lowry acid-base theory The essence of Bronsted acid-base reactions is proton transfer . A Bronsted acid is a proton donor , and a base is a proton acceptor . conjugate   acids and   conjugate bases + H 2 O CH 3 C O OH + H 3 O CH 3 C O O acetic acid base acetate anion conjugate base hydronium ion conjugate acid + H +
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2   K a  and pK a HA H 2 O A + + [H 2 O] a constant H 3 O + K a = [ A [ ] [ H 3 O + ] HA ] pK a = -logK a
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3 The equilibrium of an acid-base reaction always favors the formation of the weaker acids and weaker bases. NH 2 + HC CH HC C + NH 3 H + base weaker weaker acid H 2 O + C 6 H 5 CO 2 H + OH H + C 6 H 5 CO 2
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4 4.10 Tables of acids and bases the order of acidity of the following important compounds: acidity: RH < RCH=CH 2 < NH 3 < RC CH < ROH < H 2 O < RCO 2 H < H 3 O + basicity: R > RCH=CH > NH 2 > RC > RO > OH > RCO 2 C
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5 4.5~4.9 Factors that determine the acidity of an organic acid 1) The atom to which the H is bonded
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This note was uploaded on 10/16/2010 for the course CHEM 60280 taught by Professor Ryu during the Spring '09 term at TCU.

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Chapter 4 Proton - Chapter 4 Proton TransferA Simple Reaction 4.1~4.4 Bronsted-Lowry acid-base theory The essence of Bronsted acid-base reactions

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