A weak base is a
base that, upon dissolution in water, does not dissociate completely, so that the resulting aqueous solution contains only a small proportion of hydroxide ions and the concerned basic radical, and a large proportion of undissociated molecules of the base.
pH, Kb, and Kw
Bases yield solutions in which the hydrogen ion
activity is lower than it is in pure water, i.e., the solution is said to have a
pH greater than 7.0 at standard conditions, potentially as high as 14 (and even greater than 14 for some bases). The formula for pH is:
: