CONTENTS 



PART I. THE CHEMICAL EQUILIBRIUM OF THE IONS 



Chapter I 



THE LAWS OF ELECTROLYTIC DISSOCIATION 



1 . The law of mass action 3 



2. Electrolytic dissociation 7 



3. The dissociation of water 9 



4. The properties of water and its ions. The definitions of acids, bases 



and ampholytes 13 



5. The influence of dissolved substances upon the dissociation constant 



of water 19 



6. The influence of dissolved electrolytes upon the state of dissociation of 



water 20 



7. The hydrogen ion exponent and the pH scale 22 



8. The numerical value of the dissociation constant of water 24 



9. The general application of the mass law to the electrolytic dissociation 



of acids 29 



10. True and apparent dissociation constants of acids. Pseudoacids 32 



11. The dissociation of bases 37 



12. The hydrogen ion concentration in pure acid solutions 39 



13. Mixtures of weak acids and their alkaline salts: Regulators or buffers. 43 



14. The two acids problem 46 



15. The degree of dissociation and the dissociation residue of acids 48 



16. The dissociation of polybasic acids 55 



17. The dissociation of amphoteric electrolytes 60 



18. The determination of the isoelectric point 69 



19. The amphoteric ions 73 



20. The hydrion concentration of a pure solution of ampholyte 74 



21. The hydrion concentration and the solubility of weak acids 77 



22. The hydrion concentration and the solubility of difficultly soluble acids. 82 



23. The hydrion concentration and the solubility of difficultly soluble 



ampholytes 86 



24. The hydrolysis of salts 87 



25. Notes on methods for the determination of dissociation constants and 



of the isoelectric point 91 



Chapter II 



THE theory of THE QUANTITATIVE DETERMINATION OF ACIDITY AND ALKALINITY 



26. Definitions and statement of problem 94 



27. The theory of indicators 96 



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