The pH of a salt solution can be estimated based on knowledge of the dissociation constants and molarity.
NOTE: The following applies to a salt formed by a monoprotic acid and base.
Strength of a Acid or Base
Dissociation Constant (Kb)
weak
< 1
strong
>= 1
Acid
Base
pH
7.0
0.5 * (pKw - pKb - LOG10(salt concentration))
0.5 * (pKw + pKa + LOG10(salt concentration))
0.5 * (pKw + pKa – pKb)
where:
• pKw = 14.00
To read more or access our algorithms and calculators, please log in or register.
Specialty: Clinical Laboratory
