- Title Pages
- Foreword
- Epigraph
- Preface
- Index of symbols
- Index of units-of-measure
- List of Tables
- 1 Systems and states
- 2 Work and energy
- 3 Temperature and heat
- 4 Thermodynamics and mathematics
- 5 The First Law of Thermodynamics
- 6 Enthalpy and thermochemistry
- 7 Ideal gas processes – and two ideal gas case studies too
- 8 Spontaneous changes
- 9 The Second Law of Thermodynamics
- 10 Clausius, Kelvin, Planck, Carathéodory and Carnot
- 11 Order, information and time
- 12 The Third Law of Thermodynamics
- 13 Free energy
- 14 Chemical equilibrium and chemical kinetics
- 15 Phase equilibria
- 16 Reactions in solution
- 17 Acids, bases and buffer solutions
- 18 Boiling points and melting points
- 19 Mixing and osmosis
- 20 Electrochemistry
- 21 Mathematical round up
- 22 From ideal to real
- 23 The biochemical standard state
- 24 The bioenergetics of living cells
- 25 Macromolecular conformations and interactions
- 26 Thermodynamics today – and tomorrow
- Glossary
- Bibliography
- Index
Acids, bases and buffer solutions
Acids, bases and buffer solutions
- Chapter:
- (p.534) 17 Acids, bases and buffer solutions
- Source:
- Modern Thermodynamics for Chemists and Biochemists
- Author(s):
Dennis Sherwood
Paul Dalby
- Publisher:
- Oxford University Press
Many reactions in solution involve acids and bases, and so this chapter examines these important reactions in detail. Topics covered include the ionisation of water, pH, pOH, acids and bases, conjugate acids and conjugate bases, acid and base dissociation constants, the Henderson-Hasselbalch equation, the Henderson-Hasselbalch approximation, buffer solutions and buffer capacity. A unique feature of this chapter is a ‘first principles’ analysis of how a reaction buffered at a particular pH achieves an equilibrium composition different from that of the same reaction taking place in an unbuffered solution. This introduces some concepts which are important in understanding the biochemical standard state, as required for Chapter 23.
Keywords: dissociation, dissociation constant, ionisation of water, pH, pOH, acid, base, weak acid, conjugate acid, conjugate base, acid dissociation constant, base dissociation constant, Henderson-Hasselbalch equation, Henderson-Hasselbalch approximation, buffer solution, buffer capacity, mass action effect, Van Slyke equation
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- Title Pages
- Foreword
- Epigraph
- Preface
- Index of symbols
- Index of units-of-measure
- List of Tables
- 1 Systems and states
- 2 Work and energy
- 3 Temperature and heat
- 4 Thermodynamics and mathematics
- 5 The First Law of Thermodynamics
- 6 Enthalpy and thermochemistry
- 7 Ideal gas processes – and two ideal gas case studies too
- 8 Spontaneous changes
- 9 The Second Law of Thermodynamics
- 10 Clausius, Kelvin, Planck, Carathéodory and Carnot
- 11 Order, information and time
- 12 The Third Law of Thermodynamics
- 13 Free energy
- 14 Chemical equilibrium and chemical kinetics
- 15 Phase equilibria
- 16 Reactions in solution
- 17 Acids, bases and buffer solutions
- 18 Boiling points and melting points
- 19 Mixing and osmosis
- 20 Electrochemistry
- 21 Mathematical round up
- 22 From ideal to real
- 23 The biochemical standard state
- 24 The bioenergetics of living cells
- 25 Macromolecular conformations and interactions
- 26 Thermodynamics today – and tomorrow
- Glossary
- Bibliography
- Index