Buffer solutions

Weak electrolytes behave as strong electrolytes if their solutions are extremely dilute.In the similar manner to pH and pOH, pKa is equal to the negative decimal logarithm of the constant of dissociation for an acid, while pK, is equal to the decimal logarithm of the constant of dissociation for a base.To avoid the usage of low numbers, it was suggested to use negative decimal logarithm of the concentration of H ions to describe the level of acidity in water solution.Since the most of the constants of dissociation are expressed by very low numbers, it is better

to use their negative decimal logarithms to compare them with each other.For alkali you need to calculate the activity of OH ions, convert it to POH, and then minus the resulting number from 14.PK-log Kite for an acid (Ka-acid ionization constant).pK-log Kan for a base