Dissociation of acids/bases

Because the dissociation of acid-base pairs is an equilibrium reaction, the relationship between hydrogen ion concentration or pH and the relative concentrations of the acid and base can be described mathematically in terms of the dissociation constant for the acid-base buffer pair. When expressed as a logarithmic relationship, where pK is the negative logarithm of the dissociation constant this is known as the Henderson-Hasselbalch equation ... 

Ions are electrically charged particles formed by the spontaneous dissociation of acids, bases and salts, when dissolved in water or other ionising solvents. Ions may be classified according to sign as ... 

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